Remove Battery Status API support code from Blink

public/webview/WebView.h

 /*
  * Copyright (C) 2009, 2010, 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 23 matching lines @@
 #include "../platform/WebString.h"
 #include "../platform/WebVector.h"
 #include "WebDragOperation.h"
 #include "WebPageVisibilityState.h"
 #include "WebWidget.h"
 
 namespace WebKit {
 
 class WebAccessibilityObject;
 class WebAutofillClient;
-class WebBatteryStatus;
 class WebDevToolsAgent;
 class WebDevToolsAgentClient;
 class WebDragData;
 class WebFrame;
 class WebFrameClient;
 class WebGraphicsContext3D;
 class WebHitTestResult;
 class WebNode;
 class WebPageOverlay;
 class WebPermissionClient;
@@ skipping 435 matching lines @@
     // graphical appearance of the WebView. WebPageOverlay paints the
     // contents of the page overlay. It also provides an z-order number for
     // the page overlay. The z-order number defines the paint order the page
     // overlays. Page overlays with larger z-order number will be painted after
     // page overlays with smaller z-order number. That is, they appear above
     // the page overlays with smaller z-order number. If two page overlays have
     // the same z-order number, the later added one will be on top.
     virtual void addPageOverlay(WebPageOverlay*, int /*z-order*/) = 0;
     virtual void removePageOverlay(WebPageOverlay*) = 0;
 
-    // Battery status API support -------------------------------------------
-
-    // Updates the battery status in the BatteryClient. This also triggers the
-    // appropriate JS events (e.g. sends a 'levelchange' event to JS if the
-    // level is changed in this update from the previous update).
-    virtual void updateBatteryStatus(const WebBatteryStatus&) { }
-
     // Testing functionality for TestRunner ---------------------------------
 
 protected:
     ~WebView() {}
 };
 
 } // namespace WebKit
 
 #endif