Revert of Added an extra sync token field for extra command buffer identification.

gpu/command_buffer/client/gles2_implementation.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.
 
 // A class to emulate GLES2 over command buffers.
 
 #include "gpu/command_buffer/client/gles2_implementation.h"
 
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
@@ skipping 5478 matching lines @@
                "invalid fence sync");
     return;
   } else if (!gpu_control_->IsFenceSyncFlushReceived(fence_sync)) {
     SetGLError(GL_INVALID_OPERATION, "glGenSyncTokenCHROMIUM",
                "fence sync must be flushed before generating sync token");
     return;
   }
 
   // Copy the data over after setting the data to ensure alignment.
   SyncToken sync_token_data(gpu_control_->GetNamespaceID(),
-                            gpu_control_->GetExtraCommandBufferData(),
                             gpu_control_->GetCommandBufferID(), fence_sync);
   sync_token_data.SetVerifyFlush();
   memcpy(sync_token, &sync_token_data, sizeof(sync_token_data));
 }
 
 void GLES2Implementation::GenUnverifiedSyncTokenCHROMIUM(GLuint64 fence_sync,
                                                          GLbyte* sync_token) {
   if (!sync_token) {
     SetGLError(GL_INVALID_VALUE, "glGenNonFlushedSyncTokenCHROMIUM",
                "empty sync_token");
     return;
   } else if (!gpu_control_->IsFenceSyncRelease(fence_sync)) {
     SetGLError(GL_INVALID_VALUE, "glGenNonFlushedSyncTokenCHROMIUM",
                "invalid fence sync");
     return;
   } else if (!gpu_control_->IsFenceSyncFlushed(fence_sync)) {
     SetGLError(GL_INVALID_OPERATION, "glGenSyncTokenCHROMIUM",
                "fence sync must be flushed before generating sync token");
     return;
   }
 
   // Copy the data over after setting the data to ensure alignment.
   SyncToken sync_token_data(gpu_control_->GetNamespaceID(),
-                            gpu_control_->GetExtraCommandBufferData(),
                             gpu_control_->GetCommandBufferID(), fence_sync);
   memcpy(sync_token, &sync_token_data, sizeof(sync_token_data));
 }
 
 void GLES2Implementation::WaitSyncTokenCHROMIUM(const GLbyte* sync_token) {
   if (sync_token) {
     // Copy the data over before data access to ensure alignment.
     SyncToken sync_token_data;
     memcpy(&sync_token_data, sync_token, sizeof(SyncToken));
     if (sync_token_data.HasData()) {
@@ skipping 915 matching lines @@
   CheckGLError();
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "gpu/command_buffer/client/gles2_implementation_impl_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu