Migrates battery_status from content/renderer/ to WebKit/platform/

third_party/WebKit/Source/platform/battery/battery_dispatcher_proxy.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 "platform/battery/battery_dispatcher_proxy.h"
+
+#include "platform/battery/battery_status.h"
+#include "platform/threading/BindForMojo.h"
+#include "public/platform/Platform.h"
+#include "wtf/Assertions.h"
+
+namespace blink {
+
+BatteryDispatcherProxy::BatteryDispatcherProxy(Listener* listener)
+    : listener_(listener) {
+  ASSERT(listener_);
+}
+
+BatteryDispatcherProxy::~BatteryDispatcherProxy() {}
+
+void BatteryDispatcherProxy::StartListening() {
+  ASSERT(!monitor_.is_bound());
+  Platform::current()->connectToRemoteService(mojo::GetProxy(&monitor_));
+  // monitor_ can be null during testing.
+  if (monitor_)
+    QueryNextStatus();
+}
+
+void BatteryDispatcherProxy::StopListening() {
+  // monitor_ can be null during testing.
+  if (monitor_)
+    monitor_.reset();
+}
+
+void BatteryDispatcherProxy::QueryNextStatus() {
+  monitor_->QueryNextStatus(
+      sameThreadBindForMojo(&BatteryDispatcherProxy::OnDidChange, this));
+}
+
+void BatteryDispatcherProxy::OnDidChange(
+    device::BatteryStatusPtr battery_status) {
+  // monitor_ can be null during testing.
+  if (monitor_)
+    QueryNextStatus();
+
+  DCHECK(battery_status);
+
+  BatteryStatus status(battery_status->charging,
+                       battery_status->charging_time,
+                       battery_status->discharging_time,
+                       battery_status->level);
+  listener_->OnUpdateBatteryStatus(status);
+}
+
+} // namespace blink