Fix shutdown crash when WebMediaPlayerImpl is destroyed after RenderViewImpl is.

webkit/glue/webmediaplayer_impl.cc

 // 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.
 
 #include "webkit/glue/webmediaplayer_impl.h"
 
 #include <limits>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 80 matching lines @@
   // Now we can safely cast to int64 microseconds.
   return base::TimeDelta::FromMicroseconds(static_cast<int64>(integer));
 }
 
 }  // namespace
 
 namespace webkit_glue {
 
 WebMediaPlayerImpl::WebMediaPlayerImpl(
     WebKit::WebMediaPlayerClient* client,
-    WebMediaPlayerDelegate* delegate,
+    base::WeakPtr<WebMediaPlayerDelegate> delegate,
     media::FilterCollection* collection,
     media::MessageLoopFactory* message_loop_factory,
     MediaStreamClient* media_stream_client,
     media::MediaLog* media_log)
     : network_state_(WebKit::WebMediaPlayer::Empty),
       ready_state_(WebKit::WebMediaPlayer::HaveNothing),
       main_loop_(NULL),
       filter_collection_(collection),
       pipeline_(NULL),
       message_loop_factory_(message_loop_factory),
@@ skipping 746 matching lines @@
   return client_;
 }
 
 void WebMediaPlayerImpl::IncrementExternallyAllocatedMemory() {
   DCHECK_EQ(main_loop_, MessageLoop::current());
   incremented_externally_allocated_memory_ = true;
   v8::V8::AdjustAmountOfExternalAllocatedMemory(kPlayerExtraMemory);
 }
 
 }  // namespace webkit_glue