Add tracing for DescheduleUntilFinishedCHROMIUM.

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 <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
@@ skipping 13778 matching lines @@
     return error::kNoError;
   }
 
   deschedule_until_finished_fence_.reset(gl::GLFence::Create());
   DCHECK(deschedule_until_finished_fence_);
   if (deschedule_until_finished_fence_->HasCompleted()) {
     deschedule_until_finished_fence_.reset();
     return error::kNoError;
   }
 
+  TRACE_EVENT_ASYNC_BEGIN0("cc", "GLES2DecoderImpl::DescheduleUntilFinished",
+                           this);
   deschedule_until_finished_callback_.Run();
   return error::kDeferLaterCommands;
 }
 
 error::Error GLES2DecoderImpl::HandleInsertFenceSyncCHROMIUM(
     uint32_t immediate_data_size,
     const void* cmd_data) {
   const gles2::cmds::InsertFenceSyncCHROMIUM& c =
       *static_cast<const gles2::cmds::InsertFenceSyncCHROMIUM*>(cmd_data);
 
@@ skipping 117 matching lines @@
   }
 }
 
 void GLES2DecoderImpl::ProcessDescheduleUntilFinished() {
   if (!deschedule_until_finished_fence_)
     return;
 
   if (!deschedule_until_finished_fence_->HasCompleted())
     return;
 
+  TRACE_EVENT_ASYNC_END0("cc", "GLES2DecoderImpl::DescheduleUntilFinished",
+                         this);
   deschedule_until_finished_fence_.reset();
   reschedule_after_finished_callback_.Run();
 }
 
 bool GLES2DecoderImpl::HasMoreIdleWork() const {
   return deschedule_until_finished_fence_ ||
          !pending_readpixel_fences_.empty() ||
          gpu_tracer_->HasTracesToProcess();
 }
 
@@ skipping 2929 matching lines @@
 }
 
 // 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 "base/macros.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu