Revert "Browser compat for window.requestAnimationFrame"

client/tests/client/client.status

Index: client/tests/client/client.status
diff --git a/client/tests/client/client.status b/client/tests/client/client.status
index 880bdd8cb1ad6f1c39b88396f3847878e86a5ab3..90c3379e85bbd21f6adfbe9a31d1f99d78ab942b 100644
--- a/client/tests/client/client.status
+++ b/client/tests/client/client.status
@@ -8,8 +8,6 @@ dom/WebGL1Test: Skip  # Issue 1495
 html/html_tests: Pass, Fail   # Issue 1946.
 dom/IndexedDB3Test: Fail  # UnsupportedOperationException 'IDBCursorImplementation.get:key'
 dom/IndexedDB4Test: Skip  # Hangs in dartium. IDBKeyRange constructors not implemented.
-dom/RequestAnimationFrameTest: Skip    # drt hangs; requestAnimationFrame not implemented
-html/RequestAnimationFrameTest: Skip   # drt hangs; requestAnimationFrame not implemented
 
 [ $compiler == none && ($runtime == drt || $runtime == dartium) && $mode == debug ]
 dom/NativeGCTest: Skip  # Issue 2538.
@@ -22,8 +20,6 @@ dom/WindowNSMETest: Fail # Issue 1837, frog puts top-level members in the global
 
 [ $compiler == frog && $runtime == drt ]
 html/html_tests: Skip   # Issue 2657
-dom/RequestAnimationFrameTest: Skip   # drt hangs
-html/RequestAnimationFrameTest: Skip   # drt hangs
 
 [ $runtime == ie || $runtime == safari || $runtime == ff || $runtime == chrome || $runtime == opera || ($runtime == drt && $compiler == frog)]
 # TODO(vsm): Triage DOM tests.