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

content/browser/frame_host/render_frame_message_filter.h

Index: content/browser/frame_host/render_frame_message_filter.h
diff --git a/content/browser/frame_host/render_frame_message_filter.h b/content/browser/frame_host/render_frame_message_filter.h
index d576df03cc315d8f551aa14dc6958255e10641a6..e35162933add960b569ac7e2e6c6fa6f600ddd83 100644
--- a/content/browser/frame_host/render_frame_message_filter.h
+++ b/content/browser/frame_host/render_frame_message_filter.h
@@ -31,6 +31,7 @@ class URLRequestContextGetter;
 
 namespace content {
 class BrowserContext;
+class HostZoomMapImpl;
 class PluginServiceImpl;
 struct Referrer;
 class RenderWidgetHelper;
@@ -117,7 +118,9 @@ class CONTENT_EXPORT RenderFrameMessageFilter
                   const GURL& url,
                   const GURL& first_party_for_cookies,
                   const GetCookiesCallback& callback) override;
-
+  void GetHostZoomLevel(int32_t render_frame_id,
+                        const GURL& url,
+                        const GetHostZoomLevelCallback& callback) override;
 
 #if defined(ENABLE_PLUGINS)
   void OnGetPlugins(bool refresh, IPC::Message* reply_msg);
@@ -173,6 +176,8 @@ class CONTENT_EXPORT RenderFrameMessageFilter
   bool incognito_;
 
   const int render_process_id_;
+
+  const HostZoomMapImpl* host_zoom_map_impl_;
 };
 
 }  // namespace content