Use unified invalidation path for repaint-only style changes

Source/core/rendering/RenderLayer.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 3754 matching lines @@
                     iter->value.append(physicalBoundingBox(parentLayer));
                 }
             }
         } else {
             rect.append(logicalBoundingBox());
             rects.set(this, rect);
         }
     }
 }
 
+void RenderLayer::setShouldDoFullPaintInvalidationIncludingNonCompositingDescendants()
+{
+    // FIXME: For objects whose invalidateTreeIfNeeded won't invalidate themselves,
+    // we still need to invalidate now. crbug.com/394133.
+    if (renderer()->canSelfInvalidateDuringTreeInvalidation())
+        renderer()->setShouldDoFullPaintInvalidation(true);
+    else
+        renderer()->paintInvalidationForWholeRenderer();
+
+    for (RenderLayer* child = firstChild(); child; child = child->nextSibling()) {
+        if (child->compositingState() != PaintsIntoOwnBacking && child->compositingState() != PaintsIntoGroupedBacking)
+            child->setShouldDoFullPaintInvalidationIncludingNonCompositingDescendants();
+    }
+}
+
 DisableCompositingQueryAsserts::DisableCompositingQueryAsserts()
     : m_disabler(gCompositingQueryMode, CompositingQueriesAreAllowed) { }
 
 COMPILE_ASSERT(1 << RenderLayer::ViewportConstrainedNotCompositedReasonBits >= RenderLayer::NumNotCompositedReasons, too_many_viewport_constrained_not_compositing_reasons);
 
 } // namespace blink
 
 #ifndef NDEBUG
 void showLayerTree(const blink::RenderLayer* layer)
 {
     if (!layer)
         return;
 
     if (blink::LocalFrame* frame = layer->renderer()->frame()) {
         WTF::String output = externalRepresentation(frame, blink::RenderAsTextShowAllLayers | blink::RenderAsTextShowLayerNesting | blink::RenderAsTextShowCompositedLayers | blink::RenderAsTextShowAddresses | blink::RenderAsTextShowIDAndClass | blink::RenderAsTextDontUpdateLayout | blink::RenderAsTextShowLayoutState);
         fprintf(stderr, "%s\n", output.utf8().data());
     }
 }
 
 void showLayerTree(const blink::RenderObject* renderer)
 {
     if (!renderer)
         return;
     showLayerTree(renderer->enclosingLayer());
 }
 #endif