Enhance WebMediaPlayer::buffered() to account for evicted ranges.

media/blink/buffered_data_source_host_impl.cc

 // Copyright 2014 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 "media/blink/buffered_data_source_host_impl.h"
 
 namespace media {
 
 BufferedDataSourceHostImpl::BufferedDataSourceHostImpl()
     : total_bytes_(0),
@@ skipping 37 matching lines @@
     }
   }
 }
 
 bool BufferedDataSourceHostImpl::DidLoadingProgress() {
   bool ret = did_loading_progress_;
   did_loading_progress_ = false;
   return ret;
 }
 
+void BufferedDataSourceHostImpl::RemoveBufferedByteRange(int64 end) {
+  if (!buffered_byte_ranges_.size() || end <= buffered_byte_ranges_.start(0))
+    return;
+  Ranges<int64> removal_range;
+  removal_range.Add(
+      end, buffered_byte_ranges_.end(buffered_byte_ranges_.size() - 1));
+  buffered_byte_ranges_ = buffered_byte_ranges_.IntersectionWith(removal_range);
+}
+
 }  // namespace media