[scheduler] Use Finch to control background throttling.

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 192 matching lines @@
 
   ImageAnimationPolicy animation_policy;
 
   bool user_gesture_required_for_presentation;
 
   // Specifies the margin for WebVTT text tracks as a percentage of media
   // element height/width (for horizontal/vertical text respectively).
   // Cues will not be placed in this margin area.
   float text_track_margin_percentage;
 
+  // Specifies aggressiveness of background tab throttling.
+  // cpu_budget is given in percentages, other values are in seconds.

[Sami, 2016/11/04 16:50:28]

nit: Capitalize CPU.

[altimin, 2016/11/07 15:19:49]

Done.

+  float expensive_background_throttling_cpu_budget;
+  float expensive_background_throttling_initial_budget;
+  float expensive_background_throttling_max_budget;
+  float expensive_background_throttling_max_delay;
+
 #if defined(OS_ANDROID)
   bool text_autosizing_enabled;
   float font_scale_factor;
   float device_scale_adjustment;
   bool force_enable_zoom;
   bool fullscreen_supported;
   bool double_tap_to_zoom_enabled;
   bool user_gesture_required_for_media_playback;
   GURL default_video_poster_url;
   bool support_deprecated_target_density_dpi;
@@ skipping 35 matching lines @@
   // 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_