Remove Battery Status API support code from Blink

public/webview/WebViewClient.h

 /*
  * Copyright (C) 2009 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 31 matching lines @@
 #include "WebFileChooserParams.h"
 #include "WebPageVisibilityState.h"
 #include "WebPopupType.h"
 #include "WebTextAffinity.h"
 #include "WebTextDirection.h"
 #include "WebWidgetClient.h"
 
 namespace WebKit {
 
 class WebAccessibilityObject;
-class WebBatteryStatusClient;
 class WebColorChooser;
 class WebColorChooserClient;
 class WebCompositorOutputSurface;
 class WebDateTimeChooserCompletion;
 class WebDeviceOrientationClient;
 class WebDragData;
 class WebElement;
 class WebExternalPopupMenu;
 class WebExternalPopupMenuClient;
 class WebFileChooserCompletion;
@@ skipping 272 matching lines @@
         WebSpeechInputListener*) { return 0; }
 
     // Access the embedder API for speech recognition services.
     virtual WebSpeechRecognizer* speechRecognizer() { return 0; }
 
     // Device Orientation --------------------------------------------------
 
     // Access the embedder API for device orientation services.
     virtual WebDeviceOrientationClient* deviceOrientationClient() { return 0; }
 
-    // Battery Status ------------------------------------------------------
-
-    // Access the embedder API for battery status services.
-    virtual WebBatteryStatusClient* batteryStatusClient() { return 0; }
-
     // Zoom ----------------------------------------------------------------
 
     // Informs the browser that the zoom levels for this frame have changed from
     // the default values.
     virtual void zoomLimitsChanged(double minimumLevel, double maximumLevel) { }
 
     // Informs the browser that the zoom level has changed as a result of an
     // action that wasn't initiated by the client.
     virtual void zoomLevelChanged() { }
 
@@ skipping 34 matching lines @@
     // Informs the browser that the draggable regions have been updated.
     virtual void draggableRegionsChanged() { }
 
 protected:
     ~WebViewClient() { }
 };
 
 } // namespace WebKit
 
 #endif