Provide the DeviceManager service to the renderer directly, no app.

content/browser/frame_host/render_frame_host_impl.cc

 // Copyright 2013 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/frame_host/render_frame_host_impl.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/containers/hash_tables.h"
 #include "base/lazy_instance.h"
@@ skipping 1611 matching lines @@
 
 #if defined(ENABLE_WEBVR)
   const base::CommandLine& browser_command_line =
       *base::CommandLine::ForCurrentProcess();
 
   if (browser_command_line.HasSwitch(switches::kEnableWebVR)) {
     GetServiceRegistry()->AddService<VRService>(
         base::Bind(&VRDeviceManager::BindRequest));
   }
 #endif
+
+  GetContentClient()->browser()->RegisterRenderFrameMojoServices(
+      GetServiceRegistry(), this);
 }
 
 void RenderFrameHostImpl::SetState(RenderFrameHostImplState rfh_state) {
   // Only main frames should be swapped out and retained inside a proxy host.
   if (rfh_state == STATE_SWAPPED_OUT)
     CHECK(!GetParent());
 
   // We update the number of RenderFrameHosts in a SiteInstance when the swapped
   // out status of a RenderFrameHost gets flipped to/from active.
   if (!IsRFHStateActive(rfh_state_) && IsRFHStateActive(rfh_state))
@@ skipping 604 matching lines @@
             BrowserPluginInstanceIDToAXTreeID(value)));
         break;
       case AX_CONTENT_INT_ATTRIBUTE_LAST:
         NOTREACHED();
         break;
     }
   }
 }
 
 }  // namespace content