cc: Added a trace event to capture gpu raterization time.

cc/resources/raster_worker_pool.cc

 // Copyright 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 "cc/resources/raster_worker_pool.h"
 
 #include "base/debug/trace_event_synthetic_delay.h"
 #include "base/json/json_writer.h"
 #include "base/lazy_instance.h"
 #include "base/metrics/histogram.h"
@@ skipping 165 matching lines @@
                                  gfx::Size size,
                                  int stride) OVERRIDE {
     // TODO(alokp): For now run-on-worker-thread implies software rasterization.
     DCHECK(!use_gpu_rasterization());
     RunAnalysisOnThread(thread_index);
     return RunRasterOnThread(thread_index, buffer, size, stride);
   }
 
   virtual void RunOnOriginThread(ResourceProvider* resource_provider,
                                  ContextProvider* context_provider) OVERRIDE {
+    TRACE_EVENT1("cc",
+                 "RasterWorkerPoolTaskImpl::RunOnOriginThread",
+                 "data",
+                 TracedValue::FromValue(DataAsValue().release()));
     // TODO(alokp): For now run-on-origin-thread implies gpu rasterization.
     DCHECK(use_gpu_rasterization());
     ResourceProvider::ScopedWriteLockGL lock(resource_provider,
                                              resource()->id());
     DCHECK_NE(lock.texture_id(), 0u);
 
     GrBackendTextureDesc desc;
     desc.fFlags = kRenderTarget_GrBackendTextureFlag;
     desc.fWidth = content_rect_.width();
     desc.fHeight = content_rect_.height();
@@ skipping 574 matching lines @@
 
     internal::GraphNode* decode_node =
         CreateGraphNodeForTask(decode_task, priority, graph);
     decode_node->add_dependent(raster_node);
   }
 
   return raster_node;
 }
 
 }  // namespace cc