Chrome power profiler service

content/browser/power_profiler/power_profiler_observer.h

Index: content/browser/power_profiler/power_profiler_observer.h
diff --git a/content/browser/power_profiler/power_profiler_observer.h b/content/browser/power_profiler/power_profiler_observer.h
new file mode 100644
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+++ b/content/browser/power_profiler/power_profiler_observer.h
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+// Copyright 2014 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.
+
+#ifndef CONTENT_BROWSER_POWER_PROFILER_POWER_PROFILER_OBSERVER_H_
+#define CONTENT_BROWSER_POWER_PROFILER_POWER_PROFILER_OBSERVER_H_
+
+#include <vector>
+
+#include "base/basictypes.h"
+#include "content/common/content_export.h"
+
+namespace content {
+
+struct PowerEvent;
+typedef std::vector<PowerEvent> PowerEventVector;
+
+// A class used to monitor power usage data.
+class CONTENT_EXPORT PowerProfilerObserver {
+ public:
+  PowerProfilerObserver() {}
+  virtual ~PowerProfilerObserver() {}
+
+  // This method will be called on the UI thread.
+  virtual void OnPowerEvent(const PowerEventVector&) = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(PowerProfilerObserver);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_POWER_PROFILER_POWER_PROFILER_OBSERVER_H_