Added GL_CHROMIUM_trace_marker feature as well as gpu_toplevel markers.

webkit/common/gpu/context_provider_in_process.cc

 // Copyright (c) 2013 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 "webkit/common/gpu/context_provider_in_process.h"
 
 #include <set>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ skipping 84 matching lines @@
   if (lost_context_callback_proxy_)
     return true;
 
   if (!context3d_->InitializeOnCurrentThread())
     return false;
 
   InitializeCapabilities();
 
   std::string unique_context_name =
       base::StringPrintf("%s-%p", debug_name_.c_str(), context3d_.get());
-  context3d_->pushGroupMarkerEXT(unique_context_name.c_str());
+  context3d_->traceBeginCHROMIUM("gpu_toplevel",
+                                 unique_context_name.c_str());
 
   lost_context_callback_proxy_.reset(new LostContextCallbackProxy(this));
   return true;
 }
 
 void ContextProviderInProcess::InitializeCapabilities() {
   capabilities_.gpu = context3d_->GetImplementation()->capabilities();
 
   size_t mapped_memory_limit = context3d_->GetMappedMemoryLimit();
   capabilities_.max_transfer_buffer_usage_bytes =
@@ skipping 91 matching lines @@
   lost_context_callback_ = lost_context_callback;
 }
 
 void ContextProviderInProcess::SetMemoryPolicyChangedCallback(
     const MemoryPolicyChangedCallback& memory_policy_changed_callback) {
   // There's no memory manager for the in-process implementation.
 }
 
 }  // namespace gpu
 }  // namespace webkit