Revert of Migrates battery_status from content/renderer/ to WebKit/platform/

components/test_runner/web_test_delegate.h

Index: components/test_runner/web_test_delegate.h
diff --git a/components/test_runner/web_test_delegate.h b/components/test_runner/web_test_delegate.h
index 738fa8817ef9dbcd3343901a28e4b40d782d5f97..9aa52902387ac4dd284e21911e0c05675b74be92 100644
--- a/components/test_runner/web_test_delegate.h
+++ b/components/test_runner/web_test_delegate.h
@@ -18,6 +18,7 @@
 #define WEBTESTRUNNER_NEW_HISTORY_CAPTURE
 
 namespace blink {
+class WebBatteryStatus;
 class WebDeviceMotionData;
 class WebDeviceOrientationData;
 class WebFrame;
@@ -81,6 +82,10 @@
   // Reset the screen orientation data used for testing.
   virtual void ResetScreenOrientation() = 0;
 
+  // Notifies blink about a change in battery status.
+  virtual void DidChangeBatteryStatus(
+      const blink::WebBatteryStatus& status) = 0;
+
   // Add a message to the text dump for the layout test.
   virtual void PrintMessage(const std::string& message) = 0;