Prevent implicit framebuffer clear from clobbering alpha in emulated RGB

content/test/gpu/page_sets/pixel_tests.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 from telemetry.story import story_set as story_set_module
 
 import sys
 
 from gpu_tests import gpu_test_base
 
@@ skipping 184 matching lines @@
 
       self.AddStory(PixelTestsPage(
         url='file://../../data/gpu/pixel_webgl_noaa_noalpha.html',
         name=base_name + '.WebGLGreenTriangle.NonChromiumImage.NoAA.NoAlpha',
         test_rect=[0, 0, 300, 300],
         revision=1,
         story_set=self,
         shared_page_state_class=WebGLNonChromiumImageSharedPageState,
         expectations=expectations))
 
+      self.AddStory(PixelTestsPage(
+        url='file://../../data/gpu/pixel_webgl_noalpha_implicit_clear.html',
+        name=base_name + '.WebGLGreenTriangle.NonChromiumImage.ImplicitClear',
+        test_rect=[0, 0, 300, 300],
+        revision=1,
+        story_set=self,
+        shared_page_state_class=WebGLNonChromiumImageSharedPageState,
+        expectations=expectations))

[Ken Russell (switch to Gerrit), 2016/12/01 07:20:43]

Not necessary to add this here; this obsolete page list is only used by
trace_test.py, paradoxically. Sorry for the confusion. (See
http://crbug.com/352807 for the tracking bug for porting all the tests to the
new harness.) Please undo this change.

[Kai Ninomiya, 2016/12/01 23:30:19]

Done.

+
       # On macOS, test CSS filter effects with and without the CA compositor.
       self.AddStory(PixelTestsPage(
         url='file://../../data/gpu/filter_effects.html',
         name=base_name + '.CSSFilterEffects',
         test_rect=[0, 0, 300, 300],
         revision=2,
         story_set=self,
         shared_page_state_class=gpu_test_base.GpuSharedPageState,
         expectations=expectations,
         tolerance=10))
@@ skipping 97 matching lines @@
       story_set=self,
       shared_page_state_class=shared_page_state_class,
       expectations=expectations))
 
   @property
   def allow_mixed_story_states(self):
     # Return True here in order to be able to add the same tests with
     # a different SharedPageState on Mac which tests them with the
     # Core Profile rendering path.
     return True