[scheduler] Use Finch to control background throttling.

third_party/WebKit/Source/web/WebSettingsImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 34 matching lines @@
     : m_settings(settings),
       m_devToolsEmulator(devToolsEmulator),
       m_showFPSCounter(false),
       m_showPaintRects(false),
       m_renderVSyncNotificationEnabled(false),
       m_autoZoomFocusedNodeToLegibleScale(false),
       m_supportDeprecatedTargetDensityDPI(false),
       m_shrinksViewportContentToFit(false),
       m_viewportMetaLayoutSizeQuirk(false),
       m_viewportMetaNonUserScalableQuirk(false),
-      m_clobberUserAgentInitialScaleQuirk(false) {
+      m_clobberUserAgentInitialScaleQuirk(false),
+      m_expensiveBackgroundThrottlingCPUBudget(-1),
+      m_expensiveBackgroundThrottlingInitialBudget(-1),
+      m_expensiveBackgroundThrottlingMaxBudget(-1),
+      m_expensiveBackgroundThrottlingMaxDelay(-1) {
   DCHECK(settings);
 }
 
 void WebSettingsImpl::setFromStrings(const WebString& name,
                                      const WebString& value) {
   m_settings->setFromStrings(name, value);
 }
 
 void WebSettingsImpl::setStandardFontFamily(const WebString& font,
                                             UScriptCode script) {
@@ skipping 618 matching lines @@
 void WebSettingsImpl::setV8CacheStrategiesForCacheStorage(
     V8CacheStrategiesForCacheStorage strategies) {
   m_settings->setV8CacheStrategiesForCacheStorage(
       static_cast<blink::V8CacheStrategiesForCacheStorage>(strategies));
 }
 
 void WebSettingsImpl::setViewportStyle(WebViewportStyle style) {
   m_devToolsEmulator->setViewportStyle(style);
 }
 
+void WebSettingsImpl::setExpensiveBackgroundThrottlingCPUBudget(
+    float cpuBudget) {
+  m_expensiveBackgroundThrottlingCPUBudget = cpuBudget;
+}
+
+void WebSettingsImpl::setExpensiveBackgroundThrottlingInitialBudget(
+    float initialBudget) {
+  m_expensiveBackgroundThrottlingInitialBudget = initialBudget;
+}
+
+void WebSettingsImpl::setExpensiveBackgroundThrottlingMaxBudget(
+    float maxBudget) {
+  m_expensiveBackgroundThrottlingMaxBudget = maxBudget;
+}
+
+void WebSettingsImpl::setExpensiveBackgroundThrottlingMaxDelay(float maxDelay) {
+  m_expensiveBackgroundThrottlingMaxDelay = maxDelay;
+}
+
 }  // namespace blink