Suppress leaks/uninitialized found in compositor_unittests

tools/valgrind/memcheck/suppressions.txt

Index: tools/valgrind/memcheck/suppressions.txt
diff --git a/tools/valgrind/memcheck/suppressions.txt b/tools/valgrind/memcheck/suppressions.txt
index 095a71ee20e4d8513de85237f504631af13d667d..ae902dabdff03e9f50c11b8bb3c2beafb37eaaef 100644
--- a/tools/valgrind/memcheck/suppressions.txt
+++ b/tools/valgrind/memcheck/suppressions.txt
@@ -735,6 +735,19 @@
    fun:_ZN3gfx17PlatformFontPangoC1Ev
    fun:_ZN3gfx12PlatformFont13CreateDefaultEv
 }
+# leak in OSMesa used to run compositor_unittests in bots.
+{
+   bug_148477
+   Memcheck:Leak
+   fun:malloc
+   ...
+   fun:_ZN6webkit3gpu33WebGraphicsContext3DInProcessImpl13compileShaderEj
+   fun:_ZN7WebCore18ProgramBindingBase10loadShaderEPN6WebKit20WebGraphicsContext3DEjRKN3WTF6StringE
+   fun:_ZN7WebCore18ProgramBindingBase4initEPN6WebKit20WebGraphicsContext3DERKN3WTF6StringES7_
+   ...
+   fun:_ZN7WebCore12CCRendererGL23initializeSharedObjectsEv
+   fun:_ZN7WebCore12CCRendererGL10initializeEv
+}
 
 #-----------------------------------------------------------------------
 # 2. intentional unit test errors, or stuff that is somehow a false positive
@@ -5993,6 +6006,13 @@
    fun:_ZN3ash8internal20RootWindowController16CreateContainersEv
    fun:_ZN3ash5Shell4InitEv
 }
+{
+   bug_148475
+   Memcheck:Uninitialized
+   ...
+   fun:_ZN7testing8internal24CmpHelperFloatingPointEQIfEENS_15AssertionResultEPKcS4_T_S5_
+   fun:_ZN2ui12_GLOBAL__N_143LayerAnimationElementTest_PauseElement_Test8TestBodyEv
+}
 
 #-----------------------------------------------------------------------
 # 4. These only occur on our Google workstations
@@ -6044,3 +6064,4 @@
    fun:XOpenDisplay
    fun:_ZN4base18MessagePumpAuraX1118GetDefaultXDisplayEv
 }
+