Removed unneeded includes of base/time.h.

media/base/pipeline.h

 // Copyright (c) 2006-2009 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.
 
 // The pipeline is the public API clients use for playing back media.  Clients
 // provide a filter factory containing the filters they want the pipeline to
 // use to render media.
 
 #ifndef MEDIA_BASE_PIPELINE_H_
 #define MEDIA_BASE_PIPELINE_H_
 
 #include <string>
 
 #include "base/task.h"
-#include "base/time.h"
 #include "media/base/factory.h"
 
+namespace base {
+  class TimeDelta;
+}
+
 namespace media {
 
 // Error definitions for pipeline.  All codes indicate an error except:
 // PIPELINE_OK indicates the pipeline is running normally.
 // PIPELINE_STOPPING is used internally when Pipeline::Stop() is called.
 enum PipelineError {
   PIPELINE_OK,
   PIPELINE_STOPPING,
   PIPELINE_ERROR_URL_NOT_FOUND,
   PIPELINE_ERROR_NETWORK,
@@ skipping 143 matching lines @@
   // This method must be called only after initialization has completed.
   virtual void SetVolume(float volume) = 0;
 
  protected:
   virtual ~Pipeline() {}
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_PIPELINE_H_