Hookup the GPUTrace events.

gpu/command_buffer/service/gpu_tracer.h

Index: gpu/command_buffer/service/gpu_tracer.h
diff --git a/gpu/command_buffer/service/gpu_tracer.h b/gpu/command_buffer/service/gpu_tracer.h
new file mode 100644
index 0000000000000000000000000000000000000000..f64455c067109924b5626f8bc8ea55fbd0fe7a6f
--- /dev/null
+++ b/gpu/command_buffer/service/gpu_tracer.h
@@ -0,0 +1,42 @@
+// 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.
+
+// This file contains the GPUTrace class.
+#ifndef GPU_COMMAND_BUFFER_SERVICE_GPU_TRACER_H_
+#define GPU_COMMAND_BUFFER_SERVICE_GPU_TRACER_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+
+namespace gpu {
+namespace gles2 {
+
+// Traces GPU Commands.
+class GPUTracer {
+ public:
+  static scoped_ptr<GPUTracer> Create();
+
+  GPUTracer() {}
+  virtual ~GPUTracer() {}
+
+  // Begin a trace.
+  virtual bool Begin(const std::string& name) = 0;
+
+  // End the last started trace.
+  virtual bool End() = 0;
+
+  // Retrieve the name of the current open trace.
+  // Returns empty string if no current open trace.
+  virtual const std::string& CurrentName() const = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(GPUTracer);
+};
+
+}  // namespace gles2
+}  // namespace gpu
+
+#endif  // GPU_COMMAND_BUFFER_SERVICE_GPU_TRACER_H_