Revert of Remove dependency of c/b/loader on c/b/host_zoom_map_impl.h

content/common/render_frame_message_filter.mojom

Index: content/common/render_frame_message_filter.mojom
diff --git a/content/common/render_frame_message_filter.mojom b/content/common/render_frame_message_filter.mojom
index 279a12d636c62551dfd5c994408da0dc7674afeb..5bbf05eaf5f626c6b02725fd73a43d73c67d0ee5 100644
--- a/content/common/render_frame_message_filter.mojom
+++ b/content/common/render_frame_message_filter.mojom
@@ -17,8 +17,4 @@
   [Sync]
   GetCookies(int32 render_frame_id, url.mojom.Url url,
       url.mojom.Url first_party_for_cookies) => (string cookies);
-
-  // Retrieves the zoom level for the given URL.
-  GetHostZoomLevel(int32 render_frame_id, url.mojom.Url url)
-      => (double zoom_level);
 };