chrome power profiler chrome side changes

content/browser/power_profiler/power_profiler_observer.cc

+// 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.
+
+#include "content/public/browser/power_profiler_observer.h"
+
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/power_profiler_service.h"
+
+namespace content {
+
+PowerProfilerObserver::PowerProfilerObserver() : resolution_(NORMAL) {
+}
+
+PowerProfilerObserver::~PowerProfilerObserver() {
+}
+
+bool PowerProfilerObserver::Register() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  if (!PowerProfilerService::GetInstance()->IsAvailable())
+    return false;
+
+  PowerProfilerService::GetInstance()->AddObserver(this);
+
+  return true;
+}
+
+void PowerProfilerObserver::Unregister() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  PowerProfilerService::GetInstance()->RemoveObserver(this);
+}
+
+void PowerProfilerObserver::SetResolution(Resolution resolution) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  resolution_ = resolution;
+  PowerProfilerService::GetInstance()->UpdateResolution();
+}
+
+}  // namespace content