Add FrameHost mojo service

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 eb2c46545f1c1e350b32ca715fe0147bdcd282f4..1820954a109d2b52bb4f235f62c1a08d8f61436f 100644
--- a/content/browser/frame_host/render_frame_host_impl.h
+++ b/content/browser/frame_host/render_frame_host_impl.h
@@ -29,6 +29,7 @@
 #include "content/common/accessibility_mode_enums.h"
 #include "content/common/ax_content_node_data.h"
 #include "content/common/content_export.h"
+#include "content/common/frame_host.mojom.h"
 #include "content/common/frame_message_enums.h"
 #include "content/common/frame_replication_state.h"
 #include "content/common/image_downloader/image_downloader.mojom.h"
@@ -36,6 +37,8 @@
 #include "content/common/navigation_params.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/common/javascript_message_type.h"
+#include "mojo/public/cpp/bindings/binding.h"
+#include "mojo/public/cpp/bindings/interface_request.h"
 #include "net/http/http_response_headers.h"
 #include "third_party/WebKit/public/web/WebFrameOwnerProperties.h"
 #include "third_party/WebKit/public/web/WebTextDirection.h"
@@ -96,9 +99,11 @@ struct GlobalRequestID;
 struct Referrer;
 struct ResourceResponse;
 
-class CONTENT_EXPORT RenderFrameHostImpl : public RenderFrameHost,
-                                           public BrowserAccessibilityDelegate,
-                                           public SiteInstanceImpl::Observer {
+class CONTENT_EXPORT RenderFrameHostImpl
+    : public RenderFrameHost,
+      NON_EXPORTED_BASE(public mojom::FrameHost),
+      public BrowserAccessibilityDelegate,
+      public SiteInstanceImpl::Observer {
  public:
   using AXTreeSnapshotCallback =
       base::Callback<void(
@@ -151,6 +156,10 @@ class CONTENT_EXPORT RenderFrameHostImpl : public RenderFrameHost,
   bool IsRenderFrameLive() override;
   int GetProxyCount() override;
 
+  // mojom::FrameHost
+  void GetHostZoomLevel(const GURL& url,
+                        const GetHostZoomLevelCallback& callback) override;
+
   // IPC::Sender
   bool Send(IPC::Message* msg) override;
 
@@ -749,6 +758,8 @@ class CONTENT_EXPORT RenderFrameHostImpl : public RenderFrameHost,
   FrameTreeNode* FindAndVerifyChild(int32_t child_frame_routing_id,
                                     bad_message::BadMessageReason reason);
 
+  void BindFrameHostService(mojom::FrameHostRequest request);
+
   // Creates a Web Bluetooth Service owned by the frame.
   void CreateWebBluetoothService(
       mojo::InterfaceRequest<blink::mojom::WebBluetoothService> request);
@@ -770,6 +781,8 @@ class CONTENT_EXPORT RenderFrameHostImpl : public RenderFrameHost,
 
   RenderFrameHostDelegate* delegate_;
 
+  mojo::Binding<mojom::FrameHost> frame_host_binding_;
+
   // The SiteInstance associated with this RenderFrameHost. All content drawn
   // in this RenderFrameHost is part of this SiteInstance. Cannot change over
   // time.