Add WebUserMediaClient getter on RenderFrameImpl in preparation for getting it from WebFrameClient.

content/renderer/render_frame_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/renderer/render_frame_impl.h"
 
 #include <map>
 #include <string>
 
 #include "base/auto_reset.h"
@@ skipping 2546 matching lines @@
   DCHECK(!frame_ || frame_ == frame);
 #if defined(ENABLE_WEBRTC)
   static_cast<RTCPeerConnectionHandler*>(handler)->associateWithFrame(frame);
 #endif
 }
 
 blink::WebUserMediaClient* RenderFrameImpl::userMediaClient() {
   return render_view_->userMediaClient();
 }
 
+blink::WebMIDIClient* RenderFrameImpl::webMIDIClient() {
+  return render_view_->webMIDIClient();
+}
+
 bool RenderFrameImpl::willCheckAndDispatchMessageEvent(
     blink::WebLocalFrame* sourceFrame,
     blink::WebFrame* targetFrame,
     blink::WebSecurityOrigin targetOrigin,
     blink::WebDOMMessageEvent event) {
   DCHECK(!frame_ || frame_ == targetFrame);
   // TODO(nasko): Move implementation here. Needed state:
   // * is_swapped_out_
   return render_view_->willCheckAndDispatchMessageEvent(
       sourceFrame, targetFrame, targetOrigin, event);
@@ skipping 593 matching lines @@
     selection_text_offset_ = offset;
     selection_range_ = range;
     // This IPC is dispatched by RenderWidetHost, so use its routing ID.
     Send(new ViewHostMsg_SelectionChanged(
         GetRenderWidget()->routing_id(), text, offset, range));
   }
   GetRenderWidget()->UpdateSelectionBounds();
 }
 
 }  // namespace content