Experiment with more aggressive MSE GC on memory pressure

content/public/common/web_preferences.h

Index: content/public/common/web_preferences.h
diff --git a/content/public/common/web_preferences.h b/content/public/common/web_preferences.h
index 9bcda9e87dee064796afa827bf34f6ec94e92085..fa81c8b545b9e8ca52dfa469e18236a6fb953e88 100644
--- a/content/public/common/web_preferences.h
+++ b/content/public/common/web_preferences.h
@@ -272,6 +272,14 @@ struct CONTENT_EXPORT WebPreferences {
   // 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;