Merge 109142

Source/WebCore/rendering/RenderBlock.cpp

Index: Source/WebCore/rendering/RenderBlock.cpp
===================================================================
--- Source/WebCore/rendering/RenderBlock.cpp	(revision 109438)
+++ Source/WebCore/rendering/RenderBlock.cpp	(working copy)
@@ -846,8 +846,12 @@
             // We are nested inside a multi-column element and are being split by the span.  We have to break up
             // our block into continuations.
             RenderBoxModelObject* oldContinuation = continuation();
-            setContinuation(newBox);
 
+            // When we split an anonymous block, there's no need to do any continuation hookup,
+            // since we haven't actually split a real element.
+            if (!isAnonymousBlock())
+                setContinuation(newBox);
+
             // Someone may have put a <p> inside a <q>, causing a split.  When this happens, the :after content
             // has to move into the inline continuation.  Call updateBeforeAfterContent to ensure that our :after
             // content gets properly destroyed.
@@ -1731,6 +1735,10 @@
         return false;
     // FIXME: We don't handle non-block elements with run-in for now.
     if (!child->isRenderBlock())
+        return false;  
+    // Run-in child shouldn't intrude into the sibling block if it is part of a
+    // continuation chain. In that case, treat it as a normal block.
+    if (child->isElementContinuation() || child->virtualContinuation())
         return false;
 
     RenderBlock* blockRunIn = toRenderBlock(child);