chrome power profiler chrome side changes

content/browser/power_profiler/power_profiler_host.cc

+// Copyright 2013 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/browser/power_profiler/power_profiler_host.h"
+
+#include "base/debug/trace_event.h"
+#include "base/logging.h"
+#include "content/browser/power_profiler/power_profiler_service.h"
+#include "content/public/browser/browser_thread.h"
+
+namespace content {
+
+PowerProfilerHost::PowerProfilerHost() : resolution_(NORMAL) {
+}
+
+PowerProfilerHost::~PowerProfilerHost() {
+}
+
+bool PowerProfilerHost::Register() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  if (!PowerProfilerService::Get() || PowerProfilerService::UNINITIALIZED ==
+      PowerProfilerService::Get()->status())
+    return false;
+
+  if (BrowserThread::PostTask(BrowserThread::POWER_PROFILER, FROM_HERE,
+      base::Bind(&PowerProfilerHost::RegisterWrapper, this)))
+    return true;
+
+  return false;
+}
+
+void PowerProfilerHost::UnRegister() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  if (PowerProfilerService::Get())
+    BrowserThread::PostTask(BrowserThread::POWER_PROFILER, FROM_HERE,
+        base::Bind(&PowerProfilerHost::UnRegisterWrapper, this));
+}
+
+void PowerProfilerHost::SetResolution(Resolution resolution) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  resolution_ = resolution;
+  if (PowerProfilerService::Get())
+    BrowserThread::PostTask(BrowserThread::POWER_PROFILER, FROM_HERE,
+        base::Bind(&PowerProfilerHost::SetResolutionWrapper, this));
+}
+
+void PowerProfilerHost::RegisterWrapper() {
+  if (PowerProfilerService::Get())
+    PowerProfilerService::Get()->AddObserver(this);
+}
+
+void PowerProfilerHost::UnRegisterWrapper() {
+  if (PowerProfilerService::Get())
+    PowerProfilerService::Get()->RemoveObserver(this);
+}
+
+void PowerProfilerHost::SetResolutionWrapper() {
+  if (PowerProfilerService::Get())
+    PowerProfilerService::Get()->UpdateResolution();
+}
+
+}  // namespace base