Implement native GMB backbuffers in the GLES2 Command Decoder.

gpu/command_buffer/service/feature_info.h

 // Copyright (c) 2012 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.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_
 #define GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 81 matching lines @@
     bool ext_read_format_bgra;
     bool desktop_srgb_support;
   };
 
   FeatureInfo();
 
   // Constructor with workarounds taken from the current process's CommandLine
   explicit FeatureInfo(
       const GpuDriverBugWorkarounds& gpu_driver_bug_workarounds);
 
-  // Constructor with workarounds taken from |command_line|
+  // Constructor with workarounds taken from |command_line|.
   FeatureInfo(const base::CommandLine& command_line,
               const GpuDriverBugWorkarounds& gpu_driver_bug_workarounds);
 
   // Initializes the feature information. Needs a current GL context.
   bool Initialize(ContextType context_type,
                   const DisallowedFeatures& disallowed_features);
 
   // Helper that defaults to no disallowed features and a GLES2 context.
   bool InitializeForTesting();
   // Helper that defaults to a GLES2 context.
@@ skipping 83 matching lines @@
   // Whether the command line switch kEnableCMAAShaders is passed in.
   bool enable_cmaa_shaders_switch_;
 
   DISALLOW_COPY_AND_ASSIGN(FeatureInfo);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_