GPU: Adding sync points for cross-channel synchronization

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 408 matching lines @@
   return true;
 }
 
 bool WebGraphicsContext3DCommandBufferImpl::setParentContext(
     WebGraphicsContext3D* parent_context) {
   WebGraphicsContext3DCommandBufferImpl* parent_context_impl =
       static_cast<WebGraphicsContext3DCommandBufferImpl*>(parent_context);
   return SetParent(parent_context_impl);
 }
 
+unsigned int WebGraphicsContext3DCommandBufferImpl::insertSyncPoint() {
+  gl_->helper()->CommandBufferHelper::Flush();
+  return command_buffer_->InsertSyncPoint();
+}
+
+void WebGraphicsContext3DCommandBufferImpl::waitSyncPoint(
+    unsigned int sync_point) {
+  gl_->helper()->CommandBufferHelper::Flush();
+  command_buffer_->WaitSyncPoint(sync_point);
+}
+
 bool WebGraphicsContext3DCommandBufferImpl::SetParent(
     WebGraphicsContext3DCommandBufferImpl* new_parent) {
   if (parent_ == new_parent)
     return true;
 
   // Allocate a texture ID with respect to the parent and change the parent.
   uint32 new_parent_texture_id = 0;
   if (command_buffer_) {
     if (new_parent) {
       // Flush any remaining commands in the parent context to make sure the
@@ skipping 1107 matching lines @@
     swap_client_->OnViewContextSwapBuffersAborted();
 }
 
 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);
   }
 }