[scheduler] Use Finch to control background throttling.

third_party/WebKit/Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 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 417 matching lines @@
       m_userGestureObserved(false),
       m_shouldDispatchFirstVisuallyNonEmptyLayout(false),
       m_shouldDispatchFirstLayoutAfterFinishedParsing(false),
       m_shouldDispatchFirstLayoutAfterFinishedLoading(false),
       m_displayMode(WebDisplayModeBrowser),
       m_elasticOverscroll(FloatSize()),
       m_mutator(nullptr),
       m_scheduler(wrapUnique(Platform::current()
                                  ->currentThread()
                                  ->scheduler()
-                                 ->createWebViewScheduler(this)
+                                 ->createWebViewScheduler(this, this)
                                  .release())),
       m_lastFrameTimeMonotonic(0),
       m_overrideCompositorVisibility(false) {
   Page::PageClients pageClients;
   pageClients.chromeClient = m_chromeClientImpl.get();
   pageClients.contextMenuClient = &m_contextMenuClientImpl;
   pageClients.editorClient = &m_editorClientImpl;
   pageClients.spellCheckerClient = &m_spellCheckerClientImpl;
 
   m_page = Page::createOrdinary(pageClients);
@@ skipping 642 matching lines @@
   page()->acceptLanguagesChanged();
 }
 
 void WebViewImpl::ReportIntervention(const WebString& message) {
   if (!mainFrame())
     return;
   WebConsoleMessage consoleMessage(WebConsoleMessage::LevelWarning, message);
   mainFrame()->addMessageToConsole(consoleMessage);
 }
 
+float WebViewImpl::expensiveBackgroundThrottlingCPUBudget() {
+  return settingsImpl()->expensiveBackgroundThrottlingCPUBudget();
+}
+
+float WebViewImpl::expensiveBackgroundThrottlingInitialBudget() {
+  return settingsImpl()->expensiveBackgroundThrottlingInitialBudget();
+}
+
+float WebViewImpl::expensiveBackgroundThrottlingMaxBudget() {
+  return settingsImpl()->expensiveBackgroundThrottlingMaxBudget();
+}
+
+float WebViewImpl::expensiveBackgroundThrottlingMaxDelay() {
+  return settingsImpl()->expensiveBackgroundThrottlingMaxDelay();
+}
+
 WebInputEventResult WebViewImpl::handleKeyEvent(const WebKeyboardEvent& event) {
   DCHECK((event.type == WebInputEvent::RawKeyDown) ||
          (event.type == WebInputEvent::KeyDown) ||
          (event.type == WebInputEvent::KeyUp));
   TRACE_EVENT2("input", "WebViewImpl::handleKeyEvent", "type",
                WebInputEvent::GetName(event.type), "text",
                String(event.text).utf8());
 
   // Halt an in-progress fling on a key event.
   endActiveFlingAnimation();
@@ skipping 3329 matching lines @@
   if (focusedFrame->localFrameRoot() != mainFrameImpl()->frame())
     return nullptr;
   return focusedFrame;
 }
 
 LocalFrame* WebViewImpl::focusedLocalFrameAvailableForIme() const {
   return m_imeAcceptEvents ? focusedLocalFrameInWidget() : nullptr;
 }
 
 }  // namespace blink