RenderBlock::isSelfCollapsingBlock() should only be used when an object does not require layout.

Source/core/rendering/RenderTextControlPlaceholder.cpp

Index: Source/core/rendering/RenderTextControlPlaceholder.cpp
diff --git a/Source/core/rendering/svg/RenderSVGTSpan.cpp b/Source/core/rendering/RenderTextControlPlaceholder.cpp
similarity index 74%
copy from Source/core/rendering/svg/RenderSVGTSpan.cpp
copy to Source/core/rendering/RenderTextControlPlaceholder.cpp
index 5f34538620ba7d92041f7911df853581001b14bd..1b25596db7f4935d983e11827a50d197fcc75c10 100644
--- a/Source/core/rendering/svg/RenderSVGTSpan.cpp
+++ b/Source/core/rendering/RenderTextControlPlaceholder.cpp
@@ -1,8 +1,5 @@
 /*
- * This file is part of the WebKit project.
- *
- * Copyright (C) 2006 Oliver Hunt <ojh16@student.canterbury.ac.nz>
- * Copyright (C) 2006 Apple Computer Inc.
+ * Copyright (C) 2014 Robert Hogan <robert@roberthogan.net>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ -21,13 +18,16 @@
  */
 
 #include "config.h"
-
-#include "core/rendering/svg/RenderSVGTSpan.h"
+#include "core/rendering/RenderTextControlPlaceholder.h"
 
 namespace WebCore {
 
-RenderSVGTSpan::RenderSVGTSpan(Element* element)
-    : RenderSVGInline(element)
+RenderTextControlPlaceholder::RenderTextControlPlaceholder(Element* element)
+    : RenderBlockFlow(element)
+{
+}
+
+RenderTextControlPlaceholder::~RenderTextControlPlaceholder()
 {
 }