Add additive animation support for CSS property background-size

third_party/WebKit/LayoutTests/animations/interpolation/webkit-mask-size-interpolation-expected.txt

Index: third_party/WebKit/LayoutTests/animations/interpolation/webkit-mask-size-interpolation-expected.txt
diff --git a/third_party/WebKit/LayoutTests/animations/interpolation/webkit-mask-size-interpolation-expected.txt b/third_party/WebKit/LayoutTests/animations/interpolation/webkit-mask-size-interpolation-expected.txt
index cc20a2d7939431f503d073f9d4564862d1f59717..52d267e2a0fb8a4e54faa3bf7661ff354334ab79 100644
--- a/third_party/WebKit/LayoutTests/animations/interpolation/webkit-mask-size-interpolation-expected.txt
+++ b/third_party/WebKit/LayoutTests/animations/interpolation/webkit-mask-size-interpolation-expected.txt
@@ -1,33 +1,33 @@
 This is a testharness.js-based test.
 PASS This test uses interpolation-test.js. 
-PASS CSS Transitions: property <-webkit-mask-size> from [] to [20px] at (-0.25) is [7.5px, 7.5px, 7.5px, 7.5px] 
-PASS CSS Transitions: property <-webkit-mask-size> from [] to [20px] at (0) is [10px, 10px, 10px, 10px] 
-PASS CSS Transitions: property <-webkit-mask-size> from [] to [20px] at (0.25) is [12.5px, 12.5px, 12.5px, 12.5px] 
-PASS CSS Transitions: property <-webkit-mask-size> from [] to [20px] at (0.5) is [15px, 15px, 15px, 15px] 
-PASS CSS Transitions: property <-webkit-mask-size> from [] to [20px] at (0.75) is [17.5px, 17.5px, 17.5px, 17.5px] 
-PASS CSS Transitions: property <-webkit-mask-size> from [] to [20px] at (1) is [20px, 20px, 20px, 20px] 
-PASS CSS Transitions: property <-webkit-mask-size> from [] to [20px] at (1.25) is [22.5px, 22.5px, 22.5px, 22.5px] 
-FAIL CSS Transitions: property <-webkit-mask-size> from [initial] to [20px] at (-0.3) is [auto, auto, auto, auto] assert_equals: expected "20px , 20px , 20px , 20px " but got "auto , auto , auto , auto "
-FAIL CSS Transitions: property <-webkit-mask-size> from [initial] to [20px] at (0) is [auto, auto, auto, auto] assert_equals: expected "20px , 20px , 20px , 20px " but got "auto , auto , auto , auto "
-FAIL CSS Transitions: property <-webkit-mask-size> from [initial] to [20px] at (0.3) is [auto, auto, auto, auto] assert_equals: expected "20px , 20px , 20px , 20px " but got "auto , auto , auto , auto "
-PASS CSS Transitions: property <-webkit-mask-size> from [initial] to [20px] at (0.5) is [20px, 20px, 20px, 20px] 
-PASS CSS Transitions: property <-webkit-mask-size> from [initial] to [20px] at (0.6) is [20px, 20px, 20px, 20px] 
-PASS CSS Transitions: property <-webkit-mask-size> from [initial] to [20px] at (1) is [20px, 20px, 20px, 20px] 
-PASS CSS Transitions: property <-webkit-mask-size> from [initial] to [20px] at (1.5) is [20px, 20px, 20px, 20px] 
-PASS CSS Transitions: property <-webkit-mask-size> from [inherit] to [20px] at (-0.25) is [32.5px, 32.5px, 32.5px, 32.5px] 
-PASS CSS Transitions: property <-webkit-mask-size> from [inherit] to [20px] at (0) is [30px, 30px, 30px, 30px] 
-PASS CSS Transitions: property <-webkit-mask-size> from [inherit] to [20px] at (0.25) is [27.5px, 27.5px, 27.5px, 27.5px] 
-PASS CSS Transitions: property <-webkit-mask-size> from [inherit] to [20px] at (0.5) is [25px, 25px, 25px, 25px] 
-PASS CSS Transitions: property <-webkit-mask-size> from [inherit] to [20px] at (0.75) is [22.5px, 22.5px, 22.5px, 22.5px] 
-PASS CSS Transitions: property <-webkit-mask-size> from [inherit] to [20px] at (1) is [20px, 20px, 20px, 20px] 
-PASS CSS Transitions: property <-webkit-mask-size> from [inherit] to [20px] at (1.25) is [17.5px, 17.5px, 17.5px, 17.5px] 
-FAIL CSS Transitions: property <-webkit-mask-size> from [unset] to [20px] at (-0.3) is [auto, auto, auto, auto] assert_equals: expected "20px , 20px , 20px , 20px " but got "auto , auto , auto , auto "
-FAIL CSS Transitions: property <-webkit-mask-size> from [unset] to [20px] at (0) is [auto, auto, auto, auto] assert_equals: expected "20px , 20px , 20px , 20px " but got "auto , auto , auto , auto "
-FAIL CSS Transitions: property <-webkit-mask-size> from [unset] to [20px] at (0.3) is [auto, auto, auto, auto] assert_equals: expected "20px , 20px , 20px , 20px " but got "auto , auto , auto , auto "
-PASS CSS Transitions: property <-webkit-mask-size> from [unset] to [20px] at (0.5) is [20px, 20px, 20px, 20px] 
-PASS CSS Transitions: property <-webkit-mask-size> from [unset] to [20px] at (0.6) is [20px, 20px, 20px, 20px] 
-PASS CSS Transitions: property <-webkit-mask-size> from [unset] to [20px] at (1) is [20px, 20px, 20px, 20px] 
-PASS CSS Transitions: property <-webkit-mask-size> from [unset] to [20px] at (1.5) is [20px, 20px, 20px, 20px] 
+PASS CSS Transitions: property <-webkit-mask-size> from [] to [200px 250px] at (-0.25) is [75px 62.5px, 75px 62.5px, 75px 62.5px, 75px 62.5px] 
+PASS CSS Transitions: property <-webkit-mask-size> from [] to [200px 250px] at (0) is [100px 100px, 100px 100px, 100px 100px, 100px 100px] 
+PASS CSS Transitions: property <-webkit-mask-size> from [] to [200px 250px] at (0.25) is [125px 137.5px, 125px 137.5px, 125px 137.5px, 125px 137.5px] 
+PASS CSS Transitions: property <-webkit-mask-size> from [] to [200px 250px] at (0.5) is [150px 175px, 150px 175px, 150px 175px, 150px 175px] 
+PASS CSS Transitions: property <-webkit-mask-size> from [] to [200px 250px] at (0.75) is [175px 212.5px, 175px 212.5px, 175px 212.5px, 175px 212.5px] 
+PASS CSS Transitions: property <-webkit-mask-size> from [] to [200px 250px] at (1) is [200px 250px, 200px 250px, 200px 250px, 200px 250px] 
+PASS CSS Transitions: property <-webkit-mask-size> from [] to [200px 250px] at (1.25) is [225px 287.5px, 225px 287.5px, 225px 287.5px, 225px 287.5px] 
+FAIL CSS Transitions: property <-webkit-mask-size> from [initial] to [200px 250px] at (-0.3) is [auto, auto, auto, auto] assert_equals: expected "200px 250px , 200px 250px , 200px 250px , 200px 250px " but got "auto , auto , auto , auto "
+FAIL CSS Transitions: property <-webkit-mask-size> from [initial] to [200px 250px] at (0) is [auto, auto, auto, auto] assert_equals: expected "200px 250px , 200px 250px , 200px 250px , 200px 250px " but got "auto , auto , auto , auto "
+FAIL CSS Transitions: property <-webkit-mask-size> from [initial] to [200px 250px] at (0.3) is [auto, auto, auto, auto] assert_equals: expected "200px 250px , 200px 250px , 200px 250px , 200px 250px " but got "auto , auto , auto , auto "
+PASS CSS Transitions: property <-webkit-mask-size> from [initial] to [200px 250px] at (0.5) is [200px 250px, 200px 250px, 200px 250px, 200px 250px] 
+PASS CSS Transitions: property <-webkit-mask-size> from [initial] to [200px 250px] at (0.6) is [200px 250px, 200px 250px, 200px 250px, 200px 250px] 
+PASS CSS Transitions: property <-webkit-mask-size> from [initial] to [200px 250px] at (1) is [200px 250px, 200px 250px, 200px 250px, 200px 250px] 
+PASS CSS Transitions: property <-webkit-mask-size> from [initial] to [200px 250px] at (1.5) is [200px 250px, 200px 250px, 200px 250px, 200px 250px] 
+PASS CSS Transitions: property <-webkit-mask-size> from [inherit] to [200px 250px] at (-0.25) is [325px 312.5px, 325px 312.5px, 325px 312.5px, 325px 312.5px] 
+PASS CSS Transitions: property <-webkit-mask-size> from [inherit] to [200px 250px] at (0) is [300px 300px, 300px 300px, 300px 300px, 300px 300px] 
+PASS CSS Transitions: property <-webkit-mask-size> from [inherit] to [200px 250px] at (0.25) is [275px 287.5px, 275px 287.5px, 275px 287.5px, 275px 287.5px] 
+PASS CSS Transitions: property <-webkit-mask-size> from [inherit] to [200px 250px] at (0.5) is [250px 275px, 250px 275px, 250px 275px, 250px 275px] 
+PASS CSS Transitions: property <-webkit-mask-size> from [inherit] to [200px 250px] at (0.75) is [225px 262.5px, 225px 262.5px, 225px 262.5px, 225px 262.5px] 
+PASS CSS Transitions: property <-webkit-mask-size> from [inherit] to [200px 250px] at (1) is [200px 250px, 200px 250px, 200px 250px, 200px 250px] 
+PASS CSS Transitions: property <-webkit-mask-size> from [inherit] to [200px 250px] at (1.25) is [175px 237.5px, 175px 237.5px, 175px 237.5px, 175px 237.5px] 
+FAIL CSS Transitions: property <-webkit-mask-size> from [unset] to [200px 250px] at (-0.3) is [auto, auto, auto, auto] assert_equals: expected "200px 250px , 200px 250px , 200px 250px , 200px 250px " but got "auto , auto , auto , auto "
+FAIL CSS Transitions: property <-webkit-mask-size> from [unset] to [200px 250px] at (0) is [auto, auto, auto, auto] assert_equals: expected "200px 250px , 200px 250px , 200px 250px , 200px 250px " but got "auto , auto , auto , auto "
+FAIL CSS Transitions: property <-webkit-mask-size> from [unset] to [200px 250px] at (0.3) is [auto, auto, auto, auto] assert_equals: expected "200px 250px , 200px 250px , 200px 250px , 200px 250px " but got "auto , auto , auto , auto "
+PASS CSS Transitions: property <-webkit-mask-size> from [unset] to [200px 250px] at (0.5) is [200px 250px, 200px 250px, 200px 250px, 200px 250px] 
+PASS CSS Transitions: property <-webkit-mask-size> from [unset] to [200px 250px] at (0.6) is [200px 250px, 200px 250px, 200px 250px, 200px 250px] 
+PASS CSS Transitions: property <-webkit-mask-size> from [unset] to [200px 250px] at (1) is [200px 250px, 200px 250px, 200px 250px, 200px 250px] 
+PASS CSS Transitions: property <-webkit-mask-size> from [unset] to [200px 250px] at (1.5) is [200px 250px, 200px 250px, 200px 250px, 200px 250px] 
 PASS CSS Transitions: property <-webkit-mask-size> from [0px 0px, 0px 0px, contain, cover] to [20px 20px, 20px 20px, contain, cover] at (-0.3) is [20px 20px, 20px 20px, contain, cover] 
 PASS CSS Transitions: property <-webkit-mask-size> from [0px 0px, 0px 0px, contain, cover] to [20px 20px, 20px 20px, contain, cover] at (0) is [20px 20px, 20px 20px, contain, cover] 
 PASS CSS Transitions: property <-webkit-mask-size> from [0px 0px, 0px 0px, contain, cover] to [20px 20px, 20px 20px, contain, cover] at (0.3) is [20px 20px, 20px 20px, contain, cover] 
@@ -63,34 +63,34 @@ PASS CSS Transitions: property <-webkit-mask-size> from [0px 0px, 80px 0px] to [
 PASS CSS Transitions: property <-webkit-mask-size> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (0.75) is [30px 30px, 80px 60px, 0px 60px, 50px 30px] 
 PASS CSS Transitions: property <-webkit-mask-size> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (1) is [40px 40px, 80px 80px, 0px 80px, 40px 40px] 
 PASS CSS Transitions: property <-webkit-mask-size> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (1.25) is [50px 50px, 80px 100px, 0px 100px, 30px 50px] 
-PASS CSS Animations: property <-webkit-mask-size> from [] to [20px] at (-0.25) is [7.5px, 7.5px, 7.5px, 7.5px] 
-PASS CSS Animations: property <-webkit-mask-size> from [] to [20px] at (0) is [10px, 10px, 10px, 10px] 
-PASS CSS Animations: property <-webkit-mask-size> from [] to [20px] at (0.25) is [12.5px, 12.5px, 12.5px, 12.5px] 
-PASS CSS Animations: property <-webkit-mask-size> from [] to [20px] at (0.5) is [15px, 15px, 15px, 15px] 
-PASS CSS Animations: property <-webkit-mask-size> from [] to [20px] at (0.75) is [17.5px, 17.5px, 17.5px, 17.5px] 
-PASS CSS Animations: property <-webkit-mask-size> from [] to [20px] at (1) is [20px, 20px, 20px, 20px] 
-PASS CSS Animations: property <-webkit-mask-size> from [] to [20px] at (1.25) is [22.5px, 22.5px, 22.5px, 22.5px] 
-PASS CSS Animations: property <-webkit-mask-size> from [initial] to [20px] at (-0.3) is [auto, auto, auto, auto] 
-PASS CSS Animations: property <-webkit-mask-size> from [initial] to [20px] at (0) is [auto, auto, auto, auto] 
-PASS CSS Animations: property <-webkit-mask-size> from [initial] to [20px] at (0.3) is [auto, auto, auto, auto] 
-PASS CSS Animations: property <-webkit-mask-size> from [initial] to [20px] at (0.5) is [20px, 20px, 20px, 20px] 
-PASS CSS Animations: property <-webkit-mask-size> from [initial] to [20px] at (0.6) is [20px, 20px, 20px, 20px] 
-PASS CSS Animations: property <-webkit-mask-size> from [initial] to [20px] at (1) is [20px, 20px, 20px, 20px] 
-PASS CSS Animations: property <-webkit-mask-size> from [initial] to [20px] at (1.5) is [20px, 20px, 20px, 20px] 
-PASS CSS Animations: property <-webkit-mask-size> from [inherit] to [20px] at (-0.25) is [32.5px, 32.5px, 32.5px, 32.5px] 
-PASS CSS Animations: property <-webkit-mask-size> from [inherit] to [20px] at (0) is [30px, 30px, 30px, 30px] 
-PASS CSS Animations: property <-webkit-mask-size> from [inherit] to [20px] at (0.25) is [27.5px, 27.5px, 27.5px, 27.5px] 
-PASS CSS Animations: property <-webkit-mask-size> from [inherit] to [20px] at (0.5) is [25px, 25px, 25px, 25px] 
-PASS CSS Animations: property <-webkit-mask-size> from [inherit] to [20px] at (0.75) is [22.5px, 22.5px, 22.5px, 22.5px] 
-PASS CSS Animations: property <-webkit-mask-size> from [inherit] to [20px] at (1) is [20px, 20px, 20px, 20px] 
-PASS CSS Animations: property <-webkit-mask-size> from [inherit] to [20px] at (1.25) is [17.5px, 17.5px, 17.5px, 17.5px] 
-PASS CSS Animations: property <-webkit-mask-size> from [unset] to [20px] at (-0.3) is [auto, auto, auto, auto] 
-PASS CSS Animations: property <-webkit-mask-size> from [unset] to [20px] at (0) is [auto, auto, auto, auto] 
-PASS CSS Animations: property <-webkit-mask-size> from [unset] to [20px] at (0.3) is [auto, auto, auto, auto] 
-PASS CSS Animations: property <-webkit-mask-size> from [unset] to [20px] at (0.5) is [20px, 20px, 20px, 20px] 
-PASS CSS Animations: property <-webkit-mask-size> from [unset] to [20px] at (0.6) is [20px, 20px, 20px, 20px] 
-PASS CSS Animations: property <-webkit-mask-size> from [unset] to [20px] at (1) is [20px, 20px, 20px, 20px] 
-PASS CSS Animations: property <-webkit-mask-size> from [unset] to [20px] at (1.5) is [20px, 20px, 20px, 20px] 
+PASS CSS Animations: property <-webkit-mask-size> from [] to [200px 250px] at (-0.25) is [75px 62.5px, 75px 62.5px, 75px 62.5px, 75px 62.5px] 
+PASS CSS Animations: property <-webkit-mask-size> from [] to [200px 250px] at (0) is [100px 100px, 100px 100px, 100px 100px, 100px 100px] 
+PASS CSS Animations: property <-webkit-mask-size> from [] to [200px 250px] at (0.25) is [125px 137.5px, 125px 137.5px, 125px 137.5px, 125px 137.5px] 
+PASS CSS Animations: property <-webkit-mask-size> from [] to [200px 250px] at (0.5) is [150px 175px, 150px 175px, 150px 175px, 150px 175px] 
+PASS CSS Animations: property <-webkit-mask-size> from [] to [200px 250px] at (0.75) is [175px 212.5px, 175px 212.5px, 175px 212.5px, 175px 212.5px] 
+PASS CSS Animations: property <-webkit-mask-size> from [] to [200px 250px] at (1) is [200px 250px, 200px 250px, 200px 250px, 200px 250px] 
+PASS CSS Animations: property <-webkit-mask-size> from [] to [200px 250px] at (1.25) is [225px 287.5px, 225px 287.5px, 225px 287.5px, 225px 287.5px] 
+PASS CSS Animations: property <-webkit-mask-size> from [initial] to [200px 250px] at (-0.3) is [auto, auto, auto, auto] 
+PASS CSS Animations: property <-webkit-mask-size> from [initial] to [200px 250px] at (0) is [auto, auto, auto, auto] 
+PASS CSS Animations: property <-webkit-mask-size> from [initial] to [200px 250px] at (0.3) is [auto, auto, auto, auto] 
+PASS CSS Animations: property <-webkit-mask-size> from [initial] to [200px 250px] at (0.5) is [200px 250px, 200px 250px, 200px 250px, 200px 250px] 
+PASS CSS Animations: property <-webkit-mask-size> from [initial] to [200px 250px] at (0.6) is [200px 250px, 200px 250px, 200px 250px, 200px 250px] 
+PASS CSS Animations: property <-webkit-mask-size> from [initial] to [200px 250px] at (1) is [200px 250px, 200px 250px, 200px 250px, 200px 250px] 
+PASS CSS Animations: property <-webkit-mask-size> from [initial] to [200px 250px] at (1.5) is [200px 250px, 200px 250px, 200px 250px, 200px 250px] 
+PASS CSS Animations: property <-webkit-mask-size> from [inherit] to [200px 250px] at (-0.25) is [325px 312.5px, 325px 312.5px, 325px 312.5px, 325px 312.5px] 
+PASS CSS Animations: property <-webkit-mask-size> from [inherit] to [200px 250px] at (0) is [300px 300px, 300px 300px, 300px 300px, 300px 300px] 
+PASS CSS Animations: property <-webkit-mask-size> from [inherit] to [200px 250px] at (0.25) is [275px 287.5px, 275px 287.5px, 275px 287.5px, 275px 287.5px] 
+PASS CSS Animations: property <-webkit-mask-size> from [inherit] to [200px 250px] at (0.5) is [250px 275px, 250px 275px, 250px 275px, 250px 275px] 
+PASS CSS Animations: property <-webkit-mask-size> from [inherit] to [200px 250px] at (0.75) is [225px 262.5px, 225px 262.5px, 225px 262.5px, 225px 262.5px] 
+PASS CSS Animations: property <-webkit-mask-size> from [inherit] to [200px 250px] at (1) is [200px 250px, 200px 250px, 200px 250px, 200px 250px] 
+PASS CSS Animations: property <-webkit-mask-size> from [inherit] to [200px 250px] at (1.25) is [175px 237.5px, 175px 237.5px, 175px 237.5px, 175px 237.5px] 
+PASS CSS Animations: property <-webkit-mask-size> from [unset] to [200px 250px] at (-0.3) is [auto, auto, auto, auto] 
+PASS CSS Animations: property <-webkit-mask-size> from [unset] to [200px 250px] at (0) is [auto, auto, auto, auto] 
+PASS CSS Animations: property <-webkit-mask-size> from [unset] to [200px 250px] at (0.3) is [auto, auto, auto, auto] 
+PASS CSS Animations: property <-webkit-mask-size> from [unset] to [200px 250px] at (0.5) is [200px 250px, 200px 250px, 200px 250px, 200px 250px] 
+PASS CSS Animations: property <-webkit-mask-size> from [unset] to [200px 250px] at (0.6) is [200px 250px, 200px 250px, 200px 250px, 200px 250px] 
+PASS CSS Animations: property <-webkit-mask-size> from [unset] to [200px 250px] at (1) is [200px 250px, 200px 250px, 200px 250px, 200px 250px] 
+PASS CSS Animations: property <-webkit-mask-size> from [unset] to [200px 250px] at (1.5) is [200px 250px, 200px 250px, 200px 250px, 200px 250px] 
 PASS CSS Animations: property <-webkit-mask-size> from [0px 0px, 0px 0px, contain, cover] to [20px 20px, 20px 20px, contain, cover] at (-0.3) is [0px 0px, 0px 0px, contain, cover] 
 PASS CSS Animations: property <-webkit-mask-size> from [0px 0px, 0px 0px, contain, cover] to [20px 20px, 20px 20px, contain, cover] at (0) is [0px 0px, 0px 0px, contain, cover] 
 PASS CSS Animations: property <-webkit-mask-size> from [0px 0px, 0px 0px, contain, cover] to [20px 20px, 20px 20px, contain, cover] at (0.3) is [0px 0px, 0px 0px, contain, cover]