Add Battery Status API support in content/renderer and IPC messages.

content/renderer/renderer_webkitplatformsupport_impl.cc

Index: content/renderer/renderer_webkitplatformsupport_impl.cc
diff --git a/content/renderer/renderer_webkitplatformsupport_impl.cc b/content/renderer/renderer_webkitplatformsupport_impl.cc
index b507a732a1eacb48b0ecdf3cac6f32fa3f736a22..82fb75bc388b0d9c8f30a1801665c543f6be6596 100644
--- a/content/renderer/renderer_webkitplatformsupport_impl.cc
+++ b/content/renderer/renderer_webkitplatformsupport_impl.cc
@@ -38,6 +38,7 @@
 #include "content/public/common/content_switches.h"
 #include "content/public/common/webplugininfo.h"
 #include "content/public/renderer/content_renderer_client.h"
+#include "content/renderer/battery_status/battery_status_dispatcher.h"
 #include "content/renderer/device_sensors/device_motion_event_pump.h"
 #include "content/renderer/device_sensors/device_orientation_event_pump.h"
 #include "content/renderer/dom_storage/webstoragenamespace_impl.h"
@@ -61,6 +62,7 @@
 #include "media/filters/stream_parser_factory.h"
 #include "net/base/mime_util.h"
 #include "net/base/net_util.h"
+#include "third_party/WebKit/public/platform/WebBatteryStatusListener.h"
 #include "third_party/WebKit/public/platform/WebBlobRegistry.h"
 #include "third_party/WebKit/public/platform/WebDeviceMotionListener.h"
 #include "third_party/WebKit/public/platform/WebDeviceOrientationListener.h"
@@ -1179,4 +1181,15 @@ void RendererWebKitPlatformSupportImpl::queryStorageUsageAndQuota(
           QuotaDispatcher::CreateWebStorageQuotaCallbacksWrapper(callbacks));
 }
 
+//------------------------------------------------------------------------------
+
+void RendererWebKitPlatformSupportImpl::setBatteryStatusListener(
+    blink::WebBatteryStatusListener* listener) {
+  if (!battery_status_dispatcher_) {
+    battery_status_dispatcher_.reset(new BatteryStatusDispatcher);
+    battery_status_dispatcher_->Attach(RenderThreadImpl::current());
+  }
+  battery_status_dispatcher_->SetListener(listener);
+}
+
 }  // namespace content