Cleanup CompositingReasonFinder::requiresCompositingForPosition

Source/web/ChromeClientImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * 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.
@@ skipping 727 matching lines @@
     if (settings.acceleratedCompositingForScrollableFramesEnabled())
         flags |= WebCore::ScrollableInnerFrameTrigger;
     if (settings.acceleratedCompositingForFiltersEnabled())
         flags |= WebCore::FilterTrigger;
     if (settings.acceleratedCompositingForGpuRasterizationHintEnabled())
         flags |= WebCore::GPURasterizationTrigger;
     if (settings.acceleratedCompositingForOverflowScrollEnabled())
         flags |= WebCore::LegacyOverflowScrollTrigger;
     if (settings.compositorDrivenAcceleratedScrollingEnabled())
         flags |= WebCore::OverflowScrollTrigger;
+    // FIXME: acceleratedCompositingForFixedPositionEnabled should be renamed acceleratedCompositingForViewportConstrainedPositionEnabled().
+    // Or the sticky and fixed position elements should be behind different flags.
+    if (settings.acceleratedCompositingForFixedPositionEnabled())
+        flags |= WebCore::ViewportConstrainedPositionedTrigger;
 
     return flags;
 }
 
 void ChromeClientImpl::enterFullScreenForElement(Element* element)
 {
     m_webView->enterFullScreenForElement(element);
 }
 
 void ChromeClientImpl::exitFullScreenForElement(Element* element)
@@ skipping 204 matching lines @@
 {
     return static_cast<NavigatorContentUtilsClient::CustomHandlersState>(m_webView->client()->isProtocolHandlerRegistered(scheme, baseURL, url));
 }
 
 void NavigatorContentUtilsClientImpl::unregisterProtocolHandler(const String& scheme, const WebCore::KURL& baseURL, const WebCore::KURL& url)
 {
     m_webView->client()->unregisterProtocolHandler(scheme, baseURL, url);
 }
 
 } // namespace blink