Make render pipeline throttling opt-in

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 1925 matching lines @@
                 IntSize(), 0, PlatformEvent::NoModifiers, lastFlingSourceDevice == WebGestureDeviceTouchpad ? PlatformGestureSourceTouchpad : PlatformGestureSourceTouchscreen);
             endScrollEvent.setScrollGestureData(0, 0, ScrollByPrecisePixel, 0, 0, true, false, -1 /* null plugin id */);
 
             mainFrameImpl()->frame()->eventHandler().handleGestureScrollEnd(endScrollEvent);
         }
     }
 
     if (!m_page)
         return;
 
+    DocumentLifecycle::AllowThrottlingScope throttlingScope(mainFrameImpl()->frame()->document()->lifecycle());
     PageWidgetDelegate::animate(*m_page, lastFrameTimeMonotonic);
 }
 
 void WebViewImpl::updateAllLifecyclePhases()
 {
     TRACE_EVENT0("blink", "WebViewImpl::updateAllLifecyclePhases");
     if (!mainFrameImpl())
         return;
 
+    DocumentLifecycle::AllowThrottlingScope throttlingScope(mainFrameImpl()->frame()->document()->lifecycle());
     updateLayerTreeBackgroundColor();
 
     PageWidgetDelegate::updateAllLifecyclePhases(*m_page, *mainFrameImpl()->frame());
 
     if (InspectorOverlay* overlay = inspectorOverlay()) {
         overlay->updateAllLifecyclePhases();
         // TODO(chrishtr): integrate paint into the overlay's lifecycle.
         if (overlay->pageOverlay() && overlay->pageOverlay()->graphicsLayer())
             overlay->pageOverlay()->graphicsLayer()->paint(nullptr);
     }
@@ skipping 1556 matching lines @@
     }
 }
 
 WebHitTestResult WebViewImpl::hitTestResultAt(const WebPoint& point)
 {
     return coreHitTestResultAt(point);
 }
 
 HitTestResult WebViewImpl::coreHitTestResultAt(const WebPoint& pointInViewport)
 {
+    DocumentLifecycle::AllowThrottlingScope throttlingScope(mainFrameImpl()->frame()->document()->lifecycle());
     FrameView* view = mainFrameImpl()->frameView();
     IntPoint pointInRootFrame = view->contentsToFrame(view->viewportToContents(pointInViewport));
     return hitTestResultForRootFramePos(pointInRootFrame);
 }
 
 void WebViewImpl::copyImageAt(const WebPoint& point)
 {
     if (!m_page)
         return;
 
@@ skipping 1026 matching lines @@
 {
     // TODO(oshima): Investigate if this should return the ScreenInfo's scale factor rather than
     // page's scale factor, which can be 1 in use-zoom-for-dsf mode.
     if (!page())
         return 1;
 
     return page()->deviceScaleFactor();
 }
 
 } // namespace blink