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..5aeab176ed6fef00217ee1b577770a253f0c1495
--- /dev/null
+++ b/gpu/command_buffer/service/gpu_tracer.h
@@ -0,0 +1,57 @@
+// 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 <deque>
+#include <stack>
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/memory/linked_ptr.h"
+#include "base/memory/scoped_ptr.h"
+
+namespace gpu {
+namespace gles2 {
+
+// Traces GPU Commands.
+class GPUTracer {
+ public:
+  class Outputter;
+  class Trace;
+
+  static scoped_ptr<GPUTracer> create();

[jonathan.backer, 2012/11/23 18:55:41]

nit: Create()

I think that we only use C style for simple getters/setters.

[dsinclair, 2012/11/23 21:13:56]

Done.

+
+  virtual ~GPUTracer();
+
+  // Begin a trace.
+  bool Begin(const std::string& name);

[jonathan.backer, 2012/11/23 18:55:41]

This is good. But eventually you'll want an interface for this (everything is
pure virtual except the destructor). Probably now to justify the factory.

The actual implementations would be in an anon namespace in the .cc file.

[dsinclair, 2012/11/23 21:13:56]

Done.

+
+  // End the last started trace.
+  bool End();
+
+  // Process any completed traces.
+  void Process();
+
+ protected:
+  GPUTracer();
+
+  // Create a new trace.
+  virtual linked_ptr<GPUTracer::Trace> CreateTrace(const std::string& name) = 0;
+
+  linked_ptr<GPUTracer::Outputter> output_;
+
+ private:
+  linked_ptr<Trace> current_trace_;
+  std::deque<linked_ptr<Trace> > traces_;
+
+  DISALLOW_COPY_AND_ASSIGN(GPUTracer);
+};
+
+}  // namespace gles2
+}  // namespace gpu
+
+#endif  // GPU_COMMAND_BUFFER_SERVICE_GPU_TRACER_H_