gpu: Refactor GpuMemoryBuffer framework for multi-process support.

content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc

 // 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.
 
 #include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
 
 #include "third_party/khronos/GLES2/gl2.h"
 #ifndef GL_GLEXT_PROTOTYPES
 #define GL_GLEXT_PROTOTYPES 1
 #endif
@@ skipping 449 matching lines @@
           ->GetImplementation()->share_group();
       DCHECK(share_group);
     }
   }
 
   // Create the object exposing the OpenGL API.
   real_gl_.reset(new gpu::gles2::GLES2Implementation(
       gles2_helper_.get(),
       share_group,
       transfer_buffer_.get(),
-      bind_generates_resources_,
-      NULL));
+      bind_generates_resources_));
   gl_ = real_gl_.get();
 
   if (attributes_.shareResources) {
     // Don't add ourselves to the list before others can get to our ShareGroup.
     g_all_shared_contexts.Pointer()->insert(this);
     lock.reset();
   }
 
   if (!real_gl_->Initialize(
       start_transfer_buffer_size_,
@@ skipping 1104 matching lines @@
 
 void WebGraphicsContext3DCommandBufferImpl::OnErrorMessage(
     const std::string& message, int id) {
   if (error_message_callback_) {
     WebKit::WebString str = WebKit::WebString::fromUTF8(message.c_str());
     error_message_callback_->onErrorMessage(str, id);
   }
 }
 
 }  // namespace content