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..66903b6245958f57beb83be0e06612423457b5d8
--- /dev/null
+++ b/gpu/command_buffer/service/gpu_tracer.h
@@ -0,0 +1,44 @@
+// 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>

[jonathan.backer, 2012/12/03 14:23:14]

necessary? (maybe if you return std::string as described below)

[dsinclair, 2012/12/03 16:47:42]

Done.

+
+#include "base/basictypes.h"

[jonathan.backer, 2012/12/03 14:23:14]

necessary?

[dsinclair, 2012/12/03 16:47:42]

This is needed for the DISALLOW_COPY_AND_ASSIGN macro.

+#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;
+
+  // Process any completed traces.
+  virtual void Process() = 0;
+
+  // Retrieve the name of the current trace.

[jonathan.backer, 2012/12/03 14:23:14]

current trace ==> current open trace?

[dsinclair, 2012/12/03 16:47:42]

Done.

+  virtual const char* CurrentName() = 0;

[jonathan.backer, 2012/12/03 14:23:14]

This is generally an unsafe API because someone can hold the pointer and the
char array could go out of scope. Return a std::string and forget about it?

nit: make this a const method?

[dsinclair, 2012/12/03 16:47:42]

Done.

+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(GPUTracer);
+};
+
+}  // namespace gles2
+}  // namespace gpu
+
+#endif  // GPU_COMMAND_BUFFER_SERVICE_GPU_TRACER_H_