Added GL_CHROMIUM_trace_marker feature as well as gpu_toplevel markers.

gpu/blink/webgraphicscontext3d_impl.h

 // 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.
 
 #ifndef GPU_BLINK_WEBGRAPHICSCONTEXT3D_IMPL_H_
 #define GPU_BLINK_WEBGRAPHICSCONTEXT3D_IMPL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 475 matching lines @@
   virtual WebGLId createValuebufferCHROMIUM();
   virtual void deleteValuebuffersCHROMIUM(WGC3Dsizei count, WebGLId* ids);
   virtual void deleteValuebufferCHROMIUM(WebGLId);
   virtual void bindValuebufferCHROMIUM(WGC3Denum target, WebGLId valuebuffer);
   virtual WGC3Dboolean isValuebufferCHROMIUM(WebGLId renderbuffer);
   virtual void subscribeValueCHROMIUM(WGC3Denum target, WGC3Denum subscription);
   virtual void populateSubscribedValuesCHROMIUM(WGC3Denum target);
   virtual void uniformValuebufferCHROMIUM(WGC3Dint location,
                                           WGC3Denum target,
                                           WGC3Denum subscription);
+  virtual void traceBeginCHROMIUM(const WGC3Dchar* category_name,
+                                  const WGC3Dchar* trace_name);
+  virtual void traceEndCHROMIUM();
 
   virtual void insertEventMarkerEXT(const WGC3Dchar* marker);
   virtual void pushGroupMarkerEXT(const WGC3Dchar* marker);
   virtual void popGroupMarkerEXT();
 
   // GL_OES_vertex_array_object
   virtual WebGLId createVertexArrayOES();
   virtual void deleteVertexArrayOES(WebGLId array);
   virtual WGC3Dboolean isVertexArrayOES(WebGLId array);
   virtual void bindVertexArrayOES(WebGLId array);
@@ skipping 97 matching lines @@
   std::vector<WGC3Denum> synthetic_errors_;
 
   ::gpu::gles2::GLES2Interface* gl_;
   bool lose_context_when_out_of_memory_;
   uint32_t flush_id_;
 };
 
 }  // namespace gpu_blink
 
 #endif  // GPU_BLINK_WEBGRAPHICSCONTEXT3D_IMPL_H_