[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 71365c4a51bb04e1930d37c535146f93d9e194cb..ff8fb425230973d634ee70713762bd40ef0336f2 100644
--- a/third_party/WebKit/public/platform/WebScheduler.h
+++ b/third_party/WebKit/public/platform/WebScheduler.h
@@ -16,7 +16,6 @@
 namespace blink {
 
 class WebTaskRunner;
-class WebView;
 
 // This class is used to submit tasks and pass other information from Blink to
 // the platform's scheduler.
@@ -76,7 +75,8 @@ 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*,
+      WebViewScheduler::WebViewSchedulerSettings*) = 0;
 
   // Suspends the timer queue and increments the timer queue suspension count.
   // May only be called from the main thread.