chrome power profiler chrome side changes

chrome/browser/devtools/devtools_power_profiler_host.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 "chrome/browser/devtools/devtools_power_profiler_host.h"
+
+#include "base/json/json_writer.h"
+#include "base/logging.h"
+#include "base/time/time.h"
+#include "content/public/browser/browser_thread.h"
+
+using namespace content;
+
+DevToolsPowerProfilerHost::DevToolsPowerProfilerHost(
+    const base::WeakPtr<DevToolsWindow>& host) : frontend_host_(host) {
+  SetResolution(HIGH);
+}
+
+void DevToolsPowerProfilerHost::convertPowerValueToJSONObject(
+    base::DictionaryValue* object, PowerEvent* event) {
+  const base::TimeTicks kNullTicks;
+  object->SetDouble("timestamp",
+      convertMonotonicTimeToWallTime(event->time).ToDoubleT() * 1000.0);
+  object->SetDouble("value", event->value);
+  switch (event->type) {
+    case PowerEvent::SOC_PACKAGE:
+      object->SetString("type", "SoC_Package");
+      break;
+    default:
+      NOTREACHED();
+      break;
+    }
+}
+
+void DevToolsPowerProfilerHost::Send(PowerEvent* event) {
+  std::string json_string;
+  base::DictionaryValue message_object;
+  base::DictionaryValue* params = new base::DictionaryValue();
+  base::ListValue* event_list = new base::ListValue();
+
+  base::DictionaryValue* value = new base::DictionaryValue();
+  convertPowerValueToJSONObject(value, event);
+  event_list->Append(value);
+
+  params->Set("powerEvents", event_list);
+  message_object.Set("params", params);
+  message_object.SetString("method", "Power.PowerEventsReceived");
+
+  base::JSONWriter::Write(&message_object, &json_string);
+  BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
+      base::Bind(&DevToolsPowerProfilerHost::SendWrapper, this, json_string));
+}
+
+void DevToolsPowerProfilerHost::SendWrapper(const std::string& message) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  if (frontend_host_)
+    frontend_host_->SendPowerEvent(message);
+}
+
+base::Time DevToolsPowerProfilerHost::convertMonotonicTimeToWallTime(
+    base::TimeTicks& tick) {
+  return base::Time::UnixEpoch() + (tick - base::TimeTicks::UnixEpoch());
+}