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 641a19ee7c222cd3a495284f008d3c37bf142d44..23853f0d269f9b856df7b28ebd2e3c55bac15df3 100644
--- a/gpu/command_buffer/client/gles2_implementation.cc
+++ b/gpu/command_buffer/client/gles2_implementation.cc
@@ -3135,10 +3135,29 @@ void GLES2Implementation::TraceBeginCHROMIUM(const char* name) {
   GPU_CLIENT_SINGLE_THREAD_CHECK();
   GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glTraceBeginCHROMIUM("
                  << name << ")");
-
+  if (current_trace_name_.get()) {
+    SetGLError(GL_INVALID_OPERATION, "glTraceBeginCHROMIUM",
+               "trace already running");
+    return;
+  }
+  TRACE_EVENT_COPY_ASYNC_BEGIN0("gpu", name, this);
   SetBucketAsCString(kResultBucketId, name);
   helper_->TraceBeginCHROMIUM(kResultBucketId);
   helper_->SetBucketSize(kResultBucketId, 0);
+  current_trace_name_.reset(new std::string(name));
+}
+
+void GLES2Implementation::TraceEndCHROMIUM() {
+  GPU_CLIENT_SINGLE_THREAD_CHECK();
+  GPU_CLIENT_LOG("[" << GetLogPrefix() << "] glTraceEndCHROMIUM(" << ")");
+  if (!current_trace_name_.get()) {
+    SetGLError(GL_INVALID_OPERATION, "glTraceEndCHROMIUM",
+               "missing begin trace");
+    return;
+  }
+  helper_->TraceEndCHROMIUM();
+  TRACE_EVENT_COPY_ASYNC_END0("gpu", current_trace_name_->c_str(), this);
+  current_trace_name_.reset(NULL);
 }
 
 void* GLES2Implementation::MapBufferCHROMIUM(GLuint target, GLenum access) {