Experiment with more aggressive MSE GC on memory pressure

content/public/common/web_preferences.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_COMMON_WEB_PREFERENCES_H_
 #define CONTENT_PUBLIC_COMMON_WEB_PREFERENCES_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 254 matching lines @@
   // If enabled, disabled video track when the video is in the background.
   bool background_video_track_optimization_enabled;
 
   // If background video track optimization is enabled, don't disable video
   // track for videos with the average keyframe distance greater than this
   // value.
   // TODO(avayvod, asvitkine): Query the value directly when it is available in
   // the renderer process. See https://crbug.com/681160.
   base::TimeDelta max_keyframe_distance_to_disable_background_video;
 
+  // When MSE garbage-collection on memory pressure is enabled, the

[DaleCurtis, 2017/01/26 23:07:36]

"When memory pressure based garbage collection is enabled for MSE,"

[servolk, 2017/01/27 00:52:13]

Done.

+  // |mse_force_gc_on_memory_pressure| controls whether the GC is done
+  // immediately on memory pressure notification or during the next SourceBuffer
+  // append (slower, but more MSE-spec compliant).

[DaleCurtis, 2017/01/26 23:07:36]

s/more/is/

[servolk, 2017/01/27 00:52:13]

Done.

+  // TODO(avayvod, asvitkine): Query the value directly when it is available in

[DaleCurtis, 2017/01/26 23:07:36]

s/avayvod/servolk/

[servolk, 2017/01/27 00:52:13]

Done.

+  // the renderer process. See https://crbug.com/681160.
+  bool mse_force_gc_on_memory_pressure;
+
   // Whether it is a presentation receiver.
   bool presentation_receiver;
 
   // We try to keep the default values the same as the default values in
   // chrome, except for the cases where it would require lots of extra work for
   // the embedder to use the same default value.
   WebPreferences();
   WebPreferences(const WebPreferences& other);
   ~WebPreferences();
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_WEB_PREFERENCES_H_