Hookup the GPUTrace events.

gpu/command_buffer/client/gles2_implementation.cc

Index: gpu/command_buffer/client/gles2_implementation.cc
diff --git a/gpu/command_buffer/client/gles2_implementation.cc b/gpu/command_buffer/client/gles2_implementation.cc
index 43b88a09f0fd78da586f001cf6166e380d9f7667..6be46b9598eb219841de0f86ef17d3b529dcd86a 100644
--- a/gpu/command_buffer/client/gles2_implementation.cc
+++ b/gpu/command_buffer/client/gles2_implementation.cc
@@ -3609,12 +3609,19 @@ void GLES2Implementation::TraceBeginCHROMIUM(const char* name) {
   GPU_CLIENT_SINGLE_THREAD_CHECK();
   GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glTraceBeginCHROMIUM("
                  << name << ")");
-
+  TRACE_EVENT_ASYNC_BEGIN0("gpu", "GLES2::Trace", this);
   SetBucketAsCString(kResultBucketId, name);
   helper_->TraceBeginCHROMIUM(kResultBucketId);
   helper_->SetBucketSize(kResultBucketId, 0);
 }
 
+void GLES2Implementation::TraceEndCHROMIUM() {
+  GPU_CLIENT_SINGLE_THREAD_CHECK();
+  GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glTraceEndCHROMIUM(" << ")");
+  helper_->TraceEndCHROMIUM();
+  TRACE_EVENT_ASYNC_END0("gpu", "GLES2::Trace", this);
+}
+
 void* GLES2Implementation::MapBufferCHROMIUM(GLuint target, GLenum access) {
   GPU_CLIENT_SINGLE_THREAD_CHECK();
   GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glMapBufferCHROMIUM("