Add RenderObject::needsResizeLayout

Source/core/rendering/RenderBlock.cpp

Index: Source/core/rendering/RenderBlock.cpp
diff --git a/Source/core/rendering/RenderBlock.cpp b/Source/core/rendering/RenderBlock.cpp
index cd15f82298d0f43e0555e618307afe4122c118c4..c5828761114a9d6793f9a4f4be9073249d26e036 100644
--- a/Source/core/rendering/RenderBlock.cpp
+++ b/Source/core/rendering/RenderBlock.cpp
@@ -1632,7 +1632,8 @@ void RenderBlock::simplifiedNormalFlowLayout()
 
 bool RenderBlock::simplifiedLayout()
 {
-    if ((!posChildNeedsLayout() && !needsSimplifiedNormalFlowLayout()) || normalChildNeedsLayout() || selfNeedsLayout())
+    if ((!posChildNeedsLayout() && !needsSimplifiedNormalFlowLayout() && !needsResizeLayout())
+        || normalChildNeedsLayout() || selfNeedsLayout())
         return false;
 
 
@@ -1643,6 +1644,9 @@ bool RenderBlock::simplifiedLayout()
         if (needsPositionedMovementLayout() && !tryLayoutDoingPositionedMovementOnly())
             return false;
 
+        if (needsResizeLayout() && !tryLayoutDoingResizeOnly())
+            return false;
+
         FastTextAutosizer::LayoutScope fastTextAutosizerLayoutScope(this);
 
         // Lay out positioned descendants or objects that just need to recompute overflow.
@@ -3815,7 +3819,7 @@ bool RenderBlock::hasLineIfEmpty() const
     if (node()->isRootEditableElement())
         return true;
 
-    if (node()->isShadowRoot() && isHTMLInputElement(*toShadowRoot(node())->host()))
+    if (node()->isShadowRoot() && toShadowRoot(node())->host()->hasTagName(inputTag))

[esprehn, 2014/03/24 22:40:04]

Why did you change this?

[Xianzhu, 2014/03/24 23:53:24]

Sorry for the carelessness. May be resulted from a bad merge. Reverted.

         return true;
 
     return false;