Connect up --disable-gl-multisampling to command buffer

gpu/command_buffer/service/gles2_cmd_decoder.h

 // Copyright (c) 2009 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.
 
 // This file contains the GLES2Decoder class.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_H_
 
 #include <vector>
 
 #include "base/callback.h"
 #include "build/build_config.h"
 #include "gpu/command_buffer/service/common_decoder.h"
 #include "ui/gfx/size.h"
 
 namespace gfx {
 class GLContext;
 }
 
 namespace gpu {
 
 namespace gles2 {
 
 class ContextGroup;
 class GLES2Util;
 
+struct DisallowedExtensions {
+  bool multisampling;
+};
+
 // This class implements the AsyncAPIInterface interface, decoding GLES2
 // commands and calling GL.
 class GLES2Decoder : public CommonDecoder {
  public:
   typedef error::Error Error;
 
   // Creates a decoder.
   static GLES2Decoder* Create(ContextGroup* group);
 
   virtual ~GLES2Decoder();
@@ skipping 16 matching lines @@
   //      glGetString(GL_EXTENSIONS) that lists the extensions this context
   //      should allow. Passing NULL or "*" means allow all extensions.
   //  parent: the GLES2 decoder that can access this decoder's front buffer
   //      through a texture ID in its namespace.
   //  parent_client_texture_id: the texture ID of the front buffer in the
   //      parent's namespace.
   // Returns:
   //   true if successful.
   virtual bool Initialize(gfx::GLContext* context,
                           const gfx::Size& size,
+                          const DisallowedExtensions& disallowed_extensions,
                           const char* allowed_extensions,
                           const std::vector<int32>& attribs,
                           GLES2Decoder* parent,
                           uint32 parent_client_texture_id) = 0;
 
   // Destroys the graphics context.
   virtual void Destroy() = 0;
 
   // Resize an offscreen frame buffer.
   virtual void ResizeOffscreenFrameBuffer(const gfx::Size& size) = 0;
@@ skipping 33 matching lines @@
  private:
   bool debug_;
 
   DISALLOW_COPY_AND_ASSIGN(GLES2Decoder);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_H_