Revert 93066 - Execute all GL commands up to the put offset reported by a each flush.This means g...

content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.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.
 
 #if defined(ENABLE_GPU)
 
 #include "content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.h"
 
 #include <GLES2/gl2.h>
 #ifndef GL_GLEXT_PROTOTYPES
@@ skipping 342 matching lines @@
   if (!context_->GetChildToParentLatch(latch_id)) {
     LOG(ERROR) << "getLatch must only be called on child context";
     synthesizeGLError(GL_INVALID_OPERATION);
     *latch_id = gpu::kInvalidLatchId;
   }
 }
 
 void WebGraphicsContext3DCommandBufferImpl::waitLatchCHROMIUM(
     WGC3Duint latch_id)
 {
+  TRACE_EVENT1("gpu", "WebGfxCtx3DCmdBfrImpl::WaitLatch", "latch_id", latch_id);
+  gl_->WaitLatchCHROMIUM(latch_id);
 }
 
 void WebGraphicsContext3DCommandBufferImpl::setLatchCHROMIUM(
     WGC3Duint latch_id)
 {
+  TRACE_EVENT1("gpu", "WebGfxCtx3DCmdBfrImpl::SetLatch", "latch_id", latch_id);
+  gl_->SetLatchCHROMIUM(latch_id);
+  // required to ensure set command is sent to GPU process
+  gl_->Flush();
 }
 
 void WebGraphicsContext3DCommandBufferImpl::
     rateLimitOffscreenContextCHROMIUM() {
   gl_->RateLimitOffscreenContextCHROMIUM();
 }
 
 WebKit::WebString WebGraphicsContext3DCommandBufferImpl::
     getRequestableExtensionsCHROMIUM() {
   return WebKit::WebString::fromUTF8(
@@ skipping 671 matching lines @@
     context_lost_callback_->onContextLost();
   }
 
   RenderView* renderview =
       web_view_ ? RenderView::FromWebView(web_view_) : NULL;
   if (renderview)
     renderview->OnViewContextSwapBuffersAborted();
 }
 
 #endif  // defined(ENABLE_GPU)