Change default force composite setting to true

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 1704 matching lines @@
 
     if (m_continuousPaintingEnabled) {
         ContinuousPainter::setNeedsDisplayRecursive(m_rootGraphicsLayer, m_pageOverlays.get());
         m_client->scheduleAnimation();
     }
 }
 
 void WebViewImpl::layout()
 {
     TRACE_EVENT0("webkit", "WebViewImpl::layout");
+    // FIXME: This shouldn't be necessary to kick pages into compositing mode.

[esprehn, 2014/05/14 20:32:02]

Can you file a bug or add a better description?

[enne (OOO), 2014/05/14 20:42:20]

Done.

+    enterForceCompositingMode(true);
     PageWidgetDelegate::layout(m_page.get());
     updateLayerTreeBackgroundColor();
 
     for (size_t i = 0; i < m_linkHighlights.size(); ++i)
         m_linkHighlights[i]->updateGeometry();
 }
 
 void WebViewImpl::enterForceCompositingMode(bool enter)
 {
     if (page()->settings().forceCompositingMode() == enter)
@@ skipping 2329 matching lines @@
     const PageScaleConstraints& constraints = m_pageScaleConstraintsSet.pageDefinedConstraints();
 
     if (!mainFrameImpl() || !mainFrameImpl()->frameView())
         return false;
 
     return mainFrameImpl()->frameView()->layoutSize().width() == m_size.width
         || (constraints.minimumScale == constraints.maximumScale && constraints.minimumScale != -1);
 }
 
 } // namespace blink