[scheduler] Use Finch to control background throttling.

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 9759112e1eabdcdf6123500823acd08a50ec2d9b..63e606041ac1f9637eb33a5861f0cf30ca6206ff 100644
--- a/content/public/common/web_preferences.h
+++ b/content/public/common/web_preferences.h
@@ -210,6 +210,13 @@ struct CONTENT_EXPORT WebPreferences {
   // 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.

[clamy, 2016/11/09 14:28:51]

Other values means just max_delay right? I'm thinking the way the comment is
phrased might be confusing.

[altimin, 2016/11/09 14:46:29]

No, "other values" means everything which is not cpu_budget: initial_budget,
max_budget and max_delay.

[clamy, 2016/11/09 15:27:07]

Ok so that's not super clear. Can you s/CPU
budget/|expensive_background_throttling_cpu_budget| so that there is no
confusion?

[altimin, 2016/11/09 15:31:27]

Sure!

+  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;