Remove canvas throttling in GLES2Implementation::CopyTextureToParentTexture.

gpu/command_buffer/client/gles2_implementation.cc

 // Copyright (c) 2011 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 "../client/gles2_implementation.h"
 #include <GLES2/gles2_command_buffer.h>
 #include "../client/mapped_memory.h"
 #include "../common/gles2_cmd_utils.h"
@@ skipping 686 matching lines @@
   helper_->CommandBufferHelper::Flush();
   // Wait if we added too many swap buffers.
   if (swap_buffers_tokens_.size() > kMaxSwapBuffers) {
     helper_->WaitForToken(swap_buffers_tokens_.front());
     swap_buffers_tokens_.pop();
   }
 }
 
 void GLES2Implementation::CopyTextureToParentTextureCHROMIUM(
     GLuint client_child_id, GLuint client_parent_id) {
-  // Wait if this would add too many CopyTextureToParentTexture's
-  if (swap_buffers_tokens_.size() == kMaxSwapBuffers) {
-    helper_->WaitForToken(swap_buffers_tokens_.front());
-    swap_buffers_tokens_.pop();
-  }
   helper_->CopyTextureToParentTextureCHROMIUM(client_child_id,
       client_parent_id);
-  swap_buffers_tokens_.push(helper_->InsertToken());
-  Flush();
 }
 
 void GLES2Implementation::GenSharedIdsCHROMIUM(
   GLuint namespace_id, GLuint id_offset, GLsizei n, GLuint* ids) {
   TRACE_EVENT0("gpu", "GLES2::GenSharedIdsCHROMIUM");
   GLint* id_buffer = transfer_buffer_.AllocTyped<GLint>(n);
   helper_->GenSharedIdsCHROMIUM(namespace_id, id_offset, n,
                         transfer_buffer_id_,
                         transfer_buffer_.GetOffset(id_buffer));
   WaitForCmd();
@@ skipping 990 matching lines @@
   // Wait if this would add too many rate limit tokens.
   if (rate_limit_tokens_.size() == kMaxSwapBuffers) {
     helper_->WaitForToken(rate_limit_tokens_.front());
     rate_limit_tokens_.pop();
   }
   rate_limit_tokens_.push(helper_->InsertToken());
 }
 
 }  // namespace gles2
 }  // namespace gpu