Improve retry support for media network loading.

media/blink/buffered_data_source.h

 // Copyright 2013 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 MEDIA_BLINK_BUFFERED_DATA_SOURCE_H_
 #define MEDIA_BLINK_BUFFERED_DATA_SOURCE_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 104 matching lines @@
 };
 
 // A data source capable of loading URLs and buffering the data using an
 // in-memory sliding window.
 //
 // BufferedDataSource must be created and destroyed on the thread associated
 // with the |task_runner| passed in the constructor.
 class MEDIA_BLINK_EXPORT BufferedDataSource
     : NON_EXPORTED_BASE(public BufferedDataSourceInterface) {
  public:
+  // Number of cache misses or read failures we allow for a single Read() before
+  // signaling an error.
+  enum { kLoaderRetries = 30 };
   typedef base::Callback<void(bool)> DownloadingCB;
 
   // |url| and |cors_mode| are passed to the object. Buffered byte range changes
   // will be reported to |host|. |downloading_cb| will be called whenever the
   // downloading/paused state of the source changes.
   BufferedDataSource(
       const GURL& url,
       BufferedResourceLoader::CORSMode cors_mode,
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
       blink::WebFrame* frame,
@@ skipping 191 matching lines @@
   // reaching into this class from multiple threads to attain a WeakPtr.
   base::WeakPtr<BufferedDataSource> weak_ptr_;
   base::WeakPtrFactory<BufferedDataSource> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BufferedDataSource);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_BUFFERED_DATA_SOURCE_H_