Add CONTENT_EXPORT AudioInputRendererHost to fix the shared build.

content/browser/renderer_host/media/audio_input_renderer_host.h

 // Copyright (c) 2011 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.
 //
 // AudioInputRendererHost serves audio related requests from audio capturer
 // which lives inside the render process and provide access to audio hardware.
 //
 // OnCreateStream() request is only available in the low latency mode. It will
 // creates a shared memory, a SyncWriter and a AudioInputController for the
 // input stream.
@@ skipping 58 matching lines @@
 #include "media/audio/audio_io.h"
 #include "media/audio/simple_sources.h"
 
 namespace content {
 class ResourceContext;
 }
 
 class AudioManager;
 struct AudioParameters;
 
-class AudioInputRendererHost
+class CONTENT_EXPORT AudioInputRendererHost
     : public BrowserMessageFilter,
       public media::AudioInputController::EventHandler,
       public media_stream::AudioInputDeviceManagerEventHandler {
  public:
   struct AudioEntry {
     AudioEntry();
     ~AudioEntry();
 
     // The AudioInputController that manages the audio input stream.
     scoped_refptr<media::AudioInputController> controller;
@@ skipping 122 matching lines @@
   AudioEntryMap audio_entries_;
 
   // A map of session IDs to audio session sources.
   typedef std::map<int, int> SessionEntryMap;
   SessionEntryMap session_entries_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioInputRendererHost);
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_RENDERER_HOST_H_