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

content/renderer/renderer_webkitplatformsupport_impl.h

Index: content/renderer/renderer_webkitplatformsupport_impl.h
diff --git a/content/renderer/renderer_webkitplatformsupport_impl.h b/content/renderer/renderer_webkitplatformsupport_impl.h
index 5e3ba6937dc066eeabf5b449d1dabf4deea6cd3f..b996a509eee3a13070e44844a413d0a106c4b45b 100644
--- a/content/renderer/renderer_webkitplatformsupport_impl.h
+++ b/content/renderer/renderer_webkitplatformsupport_impl.h
@@ -36,6 +36,7 @@ class WebScreenOrientationListener;
 }
 
 namespace content {
+class BatteryStatusDispatcher;
 class DeviceMotionEventPump;
 class DeviceOrientationEventPump;
 class QuotaMessageFilter;
@@ -146,9 +147,11 @@ class CONTENT_EXPORT RendererWebKitPlatformSupportImpl
   virtual void vibrate(unsigned int milliseconds);
   virtual void cancelVibration();
   virtual void setScreenOrientationListener(
-    blink::WebScreenOrientationListener*) OVERRIDE;
+      blink::WebScreenOrientationListener*) OVERRIDE;
   virtual void lockOrientation(blink::WebScreenOrientationLockType) OVERRIDE;
   virtual void unlockOrientation() OVERRIDE;
+  virtual void setBatteryStatusListener(
+      blink::WebBatteryStatusListener* listener) OVERRIDE;
 
   // Disables the WebSandboxSupport implementation for testing.
   // Tests that do not set up a full sandbox environment should call
@@ -231,6 +234,8 @@ class CONTENT_EXPORT RendererWebKitPlatformSupportImpl
 
   scoped_ptr<blink::WebScrollbarBehavior> web_scrollbar_behavior_;
 
+  scoped_ptr<BatteryStatusDispatcher> battery_status_dispatcher_;
+
   DISALLOW_COPY_AND_ASSIGN(RendererWebKitPlatformSupportImpl);
 };