Take advantage of the new Pass() machinery on scoped_ptr{,_malloc}.

media/base/pipeline.h

Index: media/base/pipeline.h
diff --git a/media/base/pipeline.h b/media/base/pipeline.h
index cc38c4b4a14e3ab9a40f2294f4dbeca08f50f3d3..27497e57566a765a9b619b750a62ca0add3aa771 100644
--- a/media/base/pipeline.h
+++ b/media/base/pipeline.h
@@ -50,8 +50,7 @@ class MEDIA_EXPORT Pipeline : public base::RefCountedThreadSafe<Pipeline> {
   // The parameter specifies the type of event that is being signaled.
   typedef base::Callback<void(NetworkEvent)> NetworkEventCB;
 
-  // Initializes pipeline. Pipeline takes ownership of all callbacks passed
-  // into this method.
+  // Initializes pipeline.
   // |ended_callback| will be executed when the media reaches the end.
   // |error_callback_| will be executed upon an error in the pipeline.
   // |network_callback_| will be executed when there's a network event.
@@ -70,7 +69,7 @@ class MEDIA_EXPORT Pipeline : public base::RefCountedThreadSafe<Pipeline> {
   // This method is asynchronous and can execute a callback when completed.
   // If the caller provides a |start_callback|, it will be called when the
   // pipeline initialization completes.
-  virtual bool Start(FilterCollection* filter_collection,
+  virtual bool Start(scoped_ptr<FilterCollection> filter_collection,
                      const std::string& url,
                      const PipelineStatusCB& start_callback) = 0;