[scheduler] Use Finch to control background throttling.

third_party/WebKit/Source/web/WebViewImpl.cpp

Index: third_party/WebKit/Source/web/WebViewImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebViewImpl.cpp b/third_party/WebKit/Source/web/WebViewImpl.cpp
index 9faff29cc1d9fd8146e0e7018a8816800c5b7f8c..f4c2d45898327e2cfbb919c46a8bae7eaeacd3ab 100644
--- a/third_party/WebKit/Source/web/WebViewImpl.cpp
+++ b/third_party/WebKit/Source/web/WebViewImpl.cpp
@@ -432,11 +432,6 @@ WebViewImpl::WebViewImpl(WebViewClient* client,
       m_displayMode(WebDisplayModeBrowser),
       m_elasticOverscroll(FloatSize()),
       m_mutator(nullptr),
-      m_scheduler(wrapUnique(Platform::current()
-                                 ->currentThread()
-                                 ->scheduler()
-                                 ->createWebViewScheduler(this)
-                                 .release())),
       m_lastFrameTimeMonotonic(0),
       m_overrideCompositorVisibility(false) {
   Page::PageClients pageClients;
@@ -461,12 +456,16 @@ WebViewImpl::WebViewImpl(WebViewClient* client,
   StorageNamespaceController::provideStorageNamespaceTo(*m_page,
                                                         &m_storageClientImpl);
 
+  m_devToolsEmulator = DevToolsEmulator::create(this);
+
+  m_scheduler =
+      Platform::current()->currentThread()->scheduler()->createWebViewScheduler(
+          this, settingsImpl());
+
   setVisibilityState(visibilityState, true);
 
   initializeLayerTreeView();
 
-  m_devToolsEmulator = DevToolsEmulator::create(this);
-
   allInstances().add(this);
 
   m_pageImportanceSignals.setObserver(client);