Add mojo::StrongBindingSet and use it in GeolocationServiceContext.

content/browser/frame_host/render_frame_host_impl.h

Index: content/browser/frame_host/render_frame_host_impl.h
diff --git a/content/browser/frame_host/render_frame_host_impl.h b/content/browser/frame_host/render_frame_host_impl.h
index cbefae850313ac59da8225e933c4c9706532dd2d..e59fe32cbead6f41b40e5465308a44a3b7c4a2c1 100644
--- a/content/browser/frame_host/render_frame_host_impl.h
+++ b/content/browser/frame_host/render_frame_host_impl.h
@@ -602,9 +602,6 @@ class CONTENT_EXPORT RenderFrameHostImpl
   // part of the same site instance.
   bool IsSameSiteInstance(RenderFrameHostImpl* other_render_frame_host);
 
-  // Informs the content client that geolocation permissions were used.
-  void DidUseGeolocationPermission();
-
   void UpdatePermissionsForNavigation(
       const CommonNavigationParams& common_params,
       const RequestNavigationParams& request_params);