Fix ChunkDemuxer to handle a Shutdown() call before Initialize() is called.

media/filters/chunk_demuxer_unittest.cc

 // 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.
 
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "media/base/audio_decoder_config.h"
 #include "media/base/decoder_buffer.h"
 #include "media/base/mock_demuxer_host.h"
 #include "media/base/test_data_util.h"
@@ skipping 2497 matching lines @@
 
   scoped_ptr<Cluster> cluster_a(kDefaultFirstCluster());
   ASSERT_TRUE(AppendData(cluster_a->data(), cluster_a->size()));
   demuxer_->EndOfStream(PIPELINE_OK);
 
   scoped_ptr<Cluster> cluster_b(kDefaultSecondCluster());
   ASSERT_TRUE(AppendData(cluster_b->data(), cluster_b->size()));
   demuxer_->EndOfStream(PIPELINE_OK);
 }
 
+// Test receiving a Shutdown() call before we get an Initialize()
+// call. This can happen if video element gets destroyed before
+// the pipeline has a chance to initialize the demuxer.
+TEST_F(ChunkDemuxerTest, TestShutdownBeforeInitialize) {
+  demuxer_->Shutdown();
+  demuxer_->Initialize(
+      &host_, CreateInitDoneCB(DEMUXER_ERROR_COULD_NOT_OPEN));
+  message_loop_.RunUntilIdle();
+}
+
 }  // namespace media