Don't fallback if we've successfully opened a stream previously.

media/audio/audio_output_proxy.h

 // 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.
 
 #ifndef MEDIA_AUDIO_AUDIO_OUTPUT_PROXY_H_
 #define MEDIA_AUDIO_AUDIO_OUTPUT_PROXY_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
@@ skipping 27 matching lines @@
   virtual void SetVolume(double volume) OVERRIDE;
   virtual void GetVolume(double* volume) OVERRIDE;
   virtual void Close() OVERRIDE;
 
  private:
   enum State {
     kCreated,
     kOpened,
     kPlaying,
     kClosed,
-    kError,
+    kOpenError,
+    kStartError,
   };
 
   virtual ~AudioOutputProxy();
 
   scoped_refptr<AudioOutputDispatcher> dispatcher_;
   State state_;
 
   // Need to save volume here, so that we can restore it in case the stream
   // is stopped, and then started again.
   double volume_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioOutputProxy);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AUDIO_OUTPUT_PROXY_H_