Remove failed gpu pixel test entries

TBR=kbr@chromium.org
BUG=655335
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2586283002
Cr-Commit-Position: refs/heads/master@{#439512}
diff --git a/content/test/gpu/gpu_tests/pixel_expectations.py b/content/test/gpu/gpu_tests/pixel_expectations.py
index f5e9a844..d886f8d 100644
--- a/content/test/gpu/gpu_tests/pixel_expectations.py
+++ b/content/test/gpu/gpu_tests/pixel_expectations.py
@@ -28,12 +28,6 @@
     self.Fail('Pixel_ScissorTestWithPreserveDrawingBuffer',
         ['android'], bug=521588)
 
-    # TODO(xlai): Check / generate reference images.
-    self.Fail('Pixel_OffscreenCanvasTransferBeforeStyleResize',
-              bug=655335)
-    self.Fail('Pixel_OffscreenCanvasTransferAfterStyleResize',
-              bug=655335)
-
     # TODO(ccameron) fix these on Mac Retina
     # self.Fail('Pixel_CSS3DBlueBox', ['mac'], bug=533690)