Restrict CM API interface request and message dispatch.

content/browser/web_contents/web_contents_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/web_contents/web_contents_impl.h"
 
 #include <stddef.h>
 
 #include <cmath>
 #include <utility>
@@ skipping 4353 matching lines @@
     const LoadCommittedDetails& load_details) {
   for (auto& observer : observers_)
     observer.NavigationEntryCommitted(load_details);
 }
 
 void WebContentsImpl::OnAssociatedInterfaceRequest(
     RenderFrameHost* render_frame_host,
     const std::string& interface_name,
     mojo::ScopedInterfaceEndpointHandle handle) {
   auto it = binding_sets_.find(interface_name);
-  if (it != binding_sets_.end())
+  if (it != binding_sets_.end()) {
     it->second->OnRequestForFrame(render_frame_host, std::move(handle));
+    return;
+  }
+
+  service_manager::BindSourceInfo source_info(
+      render_frame_host->GetProcess()->GetChildIdentity(),
+      service_manager::CapabilitySet());
+  GetContentClient()->browser()->BindAssociatedInterfaceRequestFromFrame(
+      render_frame_host, source_info, interface_name, std::move(handle));
 }
 
 const GURL& WebContentsImpl::GetMainFrameLastCommittedURL() const {
   return GetLastCommittedURL();
 }
 
 void WebContentsImpl::RenderFrameCreated(RenderFrameHost* render_frame_host) {
   for (auto& observer : observers_)
     observer.RenderFrameCreated(render_frame_host);
   UpdateAccessibilityModeOnFrame(render_frame_host);
@@ skipping 1416 matching lines @@
 }
 
 void WebContentsImpl::MediaMutedStatusChanged(
     const WebContentsObserver::MediaPlayerId& id,
     bool muted) {
   for (auto& observer : observers_)
     observer.MediaMutedStatusChanged(id, muted);
 }
 
 }  // namespace content