[scheduler] Use Finch to control background throttling.

third_party/WebKit/public/platform/WebScheduler.h

Index: third_party/WebKit/public/platform/WebScheduler.h
diff --git a/third_party/WebKit/public/platform/WebScheduler.h b/third_party/WebKit/public/platform/WebScheduler.h
index 6e766133df8e991412f8fae71676ea463e458698..bae2fbb876aaea93b6c15563d39aba8ee23a4e48 100644
--- a/third_party/WebKit/public/platform/WebScheduler.h
+++ b/third_party/WebKit/public/platform/WebScheduler.h
@@ -16,6 +16,7 @@
 
 namespace blink {
 
+class WebSettingsImpl;
 class WebView;
 
 // This class is used to submit tasks and pass other information from Blink to
@@ -76,7 +77,8 @@ class BLINK_PLATFORM_EXPORT WebScheduler {
   // Creates a new WebViewScheduler for a given WebView. Must be called from
   // the associated WebThread.
   virtual std::unique_ptr<WebViewScheduler> createWebViewScheduler(
-      InterventionReporter*) = 0;
+      InterventionReporter*,
+      WebSettingsImpl*) = 0;
 
   // Suspends the timer queue and increments the timer queue suspension count.
   // May only be called from the main thread.