GPU: Add trace for real SwapBuffers.

gpu/command_buffer/service/gles2_cmd_decoder.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 "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include <stdio.h>
 
 #include <algorithm>
 #include <list>
@@ skipping 9015 matching lines @@
             offscreen_target_color_texture_.get());
       }
 
       // Ensure the side effects of the copy are visible to the parent
       // context. There is no need to do this for ANGLE because it uses a
       // single D3D device for all contexts.
       if (!feature_info_->feature_flags().is_angle)
         glFlush();
     }
   } else {
-    TRACE_EVENT2("gpu", "Onscreen",
-        "width", surface_->GetSize().width(),
-        "height", surface_->GetSize().height());
     if (!surface_->SwapBuffers()) {
       LOG(ERROR) << "Context lost because SwapBuffers failed.";
       LoseContext(GL_UNKNOWN_CONTEXT_RESET_ARB);
     }
   }
 }
 
 error::Error GLES2DecoderImpl::HandleEnableFeatureCHROMIUM(
     uint32 immediate_data_size, const cmds::EnableFeatureCHROMIUM& c) {
   Bucket* bucket = GetBucket(c.bucket_id);
@@ skipping 1587 matching lines @@
   DoDidUseTexImageIfNeeded(texture, texture->target());
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu