Revert of Wake Lock API implementation (Chromium part)

content/browser/frame_host/render_frame_host_delegate.h

Index: content/browser/frame_host/render_frame_host_delegate.h
diff --git a/content/browser/frame_host/render_frame_host_delegate.h b/content/browser/frame_host/render_frame_host_delegate.h
index 57f6af38fef514d5d3a22d498edba94270fae352..0f8e555d30cbc4f01c1ee17cd969278044a0de4e 100644
--- a/content/browser/frame_host/render_frame_host_delegate.h
+++ b/content/browser/frame_host/render_frame_host_delegate.h
@@ -29,7 +29,6 @@
 namespace content {
 class GeolocationServiceContext;
 class RenderFrameHost;
-class WakeLockServiceContext;
 class WebContents;
 struct AXEventNotificationDetails;
 struct ContextMenuParams;
@@ -137,9 +136,6 @@
   // Gets the GeolocationServiceContext associated with this delegate.
   virtual GeolocationServiceContext* GetGeolocationServiceContext();
 
-  // Gets the WakeLockServiceContext associated with this delegate.
-  virtual WakeLockServiceContext* GetWakeLockServiceContext();
-
   // Notification that the frame wants to go into fullscreen mode.
   // |origin| represents the origin of the frame that requests fullscreen.
   virtual void EnterFullscreenMode(const GURL& origin) {}