Battery Status API: add testing support for LayoutTests.

content/shell/renderer/webkit_test_runner.h

Index: content/shell/renderer/webkit_test_runner.h
diff --git a/content/shell/renderer/webkit_test_runner.h b/content/shell/renderer/webkit_test_runner.h
index 2ea15e47cb01eec40dd065c4fa25df6658cd5036..6ed22a27afb444721c1b4920f9e3fba3188e0f69 100644
--- a/content/shell/renderer/webkit_test_runner.h
+++ b/content/shell/renderer/webkit_test_runner.h
@@ -22,6 +22,7 @@ class SkBitmap;
 class SkCanvas;
 
 namespace blink {
+class WebBatteryStatus;
 class WebDeviceMotionData;
 class WebDeviceOrientationData;
 struct WebRect;
@@ -66,6 +67,8 @@ class WebKitTestRunner : public RenderViewObserver,
   virtual void setScreenOrientation(
       const blink::WebScreenOrientationType& orientation) OVERRIDE;
   virtual void resetScreenOrientation() OVERRIDE;
+  virtual void didChangeBatteryStatus(
+      const blink::WebBatteryStatus& status) OVERRIDE;
   virtual void printMessage(const std::string& message) OVERRIDE;
   virtual void postTask(WebTask* task) OVERRIDE;
   virtual void postDelayedTask(WebTask* task, long long ms) OVERRIDE;