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 41f0bce99c4f4556c27eae437b3f439b594f8a30..8989cafb158efef80ae7fd3e3d5457abfc981367 100644
--- a/content/browser/frame_host/render_frame_host_impl.h
+++ b/content/browser/frame_host/render_frame_host_impl.h
@@ -600,9 +600,6 @@ 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);