Remove Battery Status API support code from Blink

public/webview/WebView.h

Index: public/webview/WebView.h
diff --git a/public/webview/WebView.h b/public/webview/WebView.h
index 7280b4b4588bb8a109a945b011a124dd0d95742d..8997ef4830461760fa6ba992b697bb8dacda5f05 100644
--- a/public/webview/WebView.h
+++ b/public/webview/WebView.h
@@ -41,7 +41,6 @@ namespace WebKit {
 
 class WebAccessibilityObject;
 class WebAutofillClient;
-class WebBatteryStatus;
 class WebDevToolsAgent;
 class WebDevToolsAgentClient;
 class WebDragData;
@@ -497,13 +496,6 @@ public:
     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: