Fix blits from multisampled renderbuffers to alpha:false WebGL back buffer.

content/test/gpu/gpu_tests/webgl2_conformance_expectations.py

 # Copyright (c) 2015 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 gpu_tests.webgl_conformance_expectations import WebGLConformanceExpectations
 
 # See the GpuTestExpectations class for documentation.
 
 class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
   def __init__(self, conformance_path, url_prefixes=None, is_asan=False):
     super(WebGL2ConformanceExpectations, self).__init__(
@@ skipping 205 matching lines @@
     self.Flaky('deqp/*', ['win', 'intel', 'd3d11'], bug=628395)
 
     # Mac only.
 
     # Fails on all GPU types.
     self.Flaky('conformance/context/context-release-upon-reload.html',
         ['mac'], bug=713829)
     self.Fail('conformance2/glsl3/vector-dynamic-indexing-swizzled-lvalue.html',
         ['mac'], bug=709351)
     self.Fail('conformance2/rendering/' +
-        'blitframebuffer-resolve-to-back-buffer.html',
-        ['mac'], bug=699566)
-    self.Fail('conformance2/rendering/' +
         'framebuffer-completeness-unaffected.html',
         ['mac'], bug=630800)
     self.Fail('deqp/functional/gles3/fbocompleteness.html',
         ['mac'], bug=630800)
     self.Fail('deqp/functional/gles3/sync.html', ['mac'], bug=676848)
     # self.Fail('deqp/functional/gles3/fbocompleteness.html',
     #     ['mac', ('nvidia', 0xfe9)], bug=616562)
 
     self.Fail('conformance2/renderbuffers/framebuffer-test.html',
         ['mac'], bug=641149)
@@ skipping 884 matching lines @@
     # self.Fail(page_name,
     #     ['linux', ('nvidia', 0x1), 'debug', 'opengl'])
     # self.Fail(page_name,
     #     ['win', ('nvidia', 0x1), 'debug', 'opengl'])
 
     # Conflicts if between a generic os condition and a specific version
     # self.Fail(page_name,
     #     ['xp', ('nvidia', 0x1), 'debug', 'opengl'])
     # self.Fail(page_name,
     #     ['win', ('nvidia', 0x1), 'debug', 'opengl'])