Added tests to check that WebGL extensions are available.

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):
     super(WebGL2ConformanceExpectations, self).__init__(conformance_path)
 
   def SetExpectations(self):
+    # ===================================
+    # Extension availability expectations
+    # ===================================
+    # It's expected that not all extensions will be available on all platforms.
+    # Having a test listed here is not necessarily a problem.
+
+    self.Fail('WebglExtension.EXT_color_buffer_float',
+        ['win', 'mac', 'linux'])
+    self.Fail('WebglExtension.WEBGL_compressed_texture_astc',
+        ['win', 'mac', 'linux'])
+    self.Fail('WebglExtension.WEBGL_compressed_texture_atc',
+        ['win', 'mac', 'linux'])
+    self.Fail('WebglExtension.WEBGL_compressed_texture_etc1',
+        ['mac', 'linux'])
+    self.Fail('WebglExtension.WEBGL_compressed_texture_pvrtc',
+        ['win', 'mac', 'linux'])
+
+    # ========================
+    # Conformance expectations
+    # ========================
     # All platforms.
     self.Skip('deqp/functional/gles3/builtinprecision*.html', bug=483282)
     self.Skip('deqp/functional/gles3/draw.html', bug=483282)
     self.Skip('deqp/functional/gles3/fbocolorbuffer.html', bug=483282)
     self.Skip('deqp/functional/gles3/fbocompleteness.html', bug=483282)
     self.Skip('deqp/functional/gles3/fbodepthbuffer.html', bug=483282)
     self.Skip('deqp/functional/gles3/fboinvalidate.html', bug=483282)
     self.Skip('deqp/functional/gles3/fbomultisample.html', bug=483282)
     self.Skip('deqp/functional/gles3/fborender.html', bug=483282)
     self.Skip('deqp/functional/gles3/fragmentoutput.html', bug=483282)
@@ skipping 448 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'])