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

content/public/test/layouttest_support.h

Index: content/public/test/layouttest_support.h
diff --git a/content/public/test/layouttest_support.h b/content/public/test/layouttest_support.h
index 402fd044e164636ad7dd7172cde84c949ca3e039..a3171ba0cbd0343575e9fd5a6c1df156e84f20ce 100644
--- a/content/public/test/layouttest_support.h
+++ b/content/public/test/layouttest_support.h
@@ -17,6 +17,7 @@
 class GURL;
 
 namespace blink {
+class WebBatteryStatus;
 class WebDeviceMotionData;
 class WebDeviceOrientationData;
 class WebGamepad;
@@ -78,6 +79,9 @@
 // a listener through BlinkPlatformImpl::setDeviceOrientationListener().
 void SetMockDeviceOrientationData(const blink::WebDeviceOrientationData& data);
 
+// Notifies blink that battery status has changed.
+void MockBatteryStatusChanged(const blink::WebBatteryStatus& status);
+
 // Returns the length of the local session history of a render view.
 int GetLocalSessionHistoryLength(RenderView* render_view);