[repaint-after-layout] Only repaint SVG root element when needed.

Source/core/rendering/LayoutRectRecorder.cpp

 /*
  * Copyright (c) 2013, 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 24 matching lines @@
 
 namespace WebCore {
 
 bool LayoutRectRecorder::shouldRecordLayoutRects()
 {
     bool isTracing;
     TRACE_EVENT_CATEGORY_GROUP_ENABLED(TRACE_DISABLED_BY_DEFAULT("blink.debug.layout"), &isTracing);
     return RuntimeEnabledFeatures::repaintAfterLayoutEnabled() || isTracing;
 }
 
-LayoutRectRecorder::LayoutRectRecorder(RenderObject& object, bool skipRecording)
+LayoutRectRecorder::LayoutRectRecorder(RenderObject& object, bool record)
     : m_object(object)
-    , m_skipRecording(skipRecording)
+    , m_record(record)
 {
     if (!shouldRecordLayoutRects())
         return;
-    if (m_skipRecording)
+    if (!m_record)
         return;
 
     if (!m_object.layoutDidGetCalled()) {
         RenderLayerModelObject* containerForRepaint = m_object.containerForRepaint();
         m_object.setOldRepaintRect(m_object.clippedOverflowRectForRepaint(containerForRepaint));
 
         if (m_object.hasOutline())
             m_object.setOldOutlineRect(m_object.outlineBoundsForRepaint(containerForRepaint));
     }
 
     // If should do repaint was set previously make sure we don't accidentally unset it.
     if (!m_object.shouldDoFullRepaintAfterLayout())
         m_object.setShouldDoFullRepaintAfterLayout(m_object.selfNeedsLayout());
     if (m_object.needsPositionedMovementLayoutOnly())
         m_object.setOnlyNeededPositionedMovementLayout(true);
 
     m_object.setLayoutDidGetCalled(true);
 }
 
 LayoutRectRecorder::~LayoutRectRecorder()
 {
     if (!shouldRecordLayoutRects())
         return;
-    if (m_skipRecording)
+    if (!m_record)
         return;
 
     // Note, we don't store the repaint container because it can change during layout.
     RenderLayerModelObject* containerForRepaint = m_object.containerForRepaint();
     m_object.setNewRepaintRect(m_object.clippedOverflowRectForRepaint(containerForRepaint));
 
     if (m_object.hasOutline())
         m_object.setNewOutlineRect(m_object.outlineBoundsForRepaint(containerForRepaint));
 }
 
 } // namespace WebCore