Experiment with more aggressive MSE GC on memory pressure

content/browser/renderer_host/render_view_host_impl.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 "content/browser/renderer_host/render_view_host_impl.h"
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 532 matching lines @@
 
   // TODO(avayvod, asvitkine): Query the value directly when it is available in
   // the renderer process. See https://crbug.com/681160.
   prefs.max_keyframe_distance_to_disable_background_video =
       base::TimeDelta::FromMilliseconds(
           variations::GetVariationParamByFeatureAsInt(
               media::kBackgroundVideoTrackOptimization,
               "max_keyframe_distance_ms",
               base::TimeDelta::FromSeconds(10).InMilliseconds()));
 
+  // TODO(servolk, asvitkine): Query the value directly when it is available in
+  // the renderer process. See https://crbug.com/681160.
+  prefs.enable_instant_source_buffer_gc =
+      variations::GetVariationParamByFeatureAsBool(
+          media::kMemoryPressureBasedSourceBufferGC,
+          "enable_instant_source_buffer_gc", false);
+
   std::map<std::string, std::string> expensive_background_throttling_prefs;
   variations::GetVariationParamsByFeature(
       features::kExpensiveBackgroundTimerThrottling,
       &expensive_background_throttling_prefs);
   SetFloatParameterFromMap(expensive_background_throttling_prefs, "cpu_budget",
                            &prefs.expensive_background_throttling_cpu_budget);
   SetFloatParameterFromMap(
       expensive_background_throttling_prefs, "initial_budget",
       &prefs.expensive_background_throttling_initial_budget);
   SetFloatParameterFromMap(expensive_background_throttling_prefs, "max_budget",
@@ skipping 421 matching lines @@
   } else {
     render_view_ready_on_process_launch_ = true;
   }
 }
 
 void RenderViewHostImpl::RenderViewReady() {
   delegate_->RenderViewReady(this);
 }
 
 }  // namespace content