Privitize WaitTillDataReady() and DataReady().

content/browser/renderer_host/media/audio_sync_reader.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 CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_SYNC_READER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_SYNC_READER_H_
 
 #include "base/file_descriptor_posix.h"
 #include "base/process.h"
 #include "base/sync_socket.h"
@@ skipping 15 matching lines @@
 class AudioSyncReader : public media::AudioOutputController::SyncReader {
  public:
   AudioSyncReader(base::SharedMemory* shared_memory,
                   const media::AudioParameters& params,
                   int input_channels);
 
   virtual ~AudioSyncReader();
 
   // media::AudioOutputController::SyncReader implementations.
   virtual void UpdatePendingBytes(uint32 bytes) OVERRIDE;
-  virtual int Read(media::AudioBus* source, media::AudioBus* dest) OVERRIDE;
+  virtual int Read(bool block,
+                   const media::AudioBus* source,
+                   media::AudioBus* dest) OVERRIDE;
   virtual void Close() OVERRIDE;
-  virtual bool DataReady() OVERRIDE;
 
   bool Init();
   bool PrepareForeignSocketHandle(base::ProcessHandle process_handle,
 #if defined(OS_WIN)
                                   base::SyncSocket::Handle* foreign_handle);
 #else
                                   base::FileDescriptor* foreign_handle);
 #endif
 
  private:
+  // Indicates whether the renderer has data available for reading.
+  bool DataReady();
+
+  // Blocks until DataReady() is true or a timeout expires.
+  void WaitTillDataReady();
+
   base::SharedMemory* shared_memory_;
 
   // Number of input channels for synchronized I/O.
   int input_channels_;
 
   // Socket for transmitting audio data.
   scoped_ptr<base::CancelableSyncSocket> socket_;
 
   // Socket to be used by the renderer. The reference is released after
   // PrepareForeignSocketHandle() is called and ran successfully.
@@ skipping 12 matching lines @@
   // report a UMA stat during destruction.
   size_t renderer_callback_count_;
   size_t renderer_missed_callback_count_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioSyncReader);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_SYNC_READER_H_