Make "insertHTML" execCommand not to crash on TEXTAREA

Source/core/editing/ReplaceSelectionCommand.cpp

Index: Source/core/editing/ReplaceSelectionCommand.cpp
diff --git a/Source/core/editing/ReplaceSelectionCommand.cpp b/Source/core/editing/ReplaceSelectionCommand.cpp
index 0975edaaacbaed5c06674840e5429380726a0829..30db418951bdd358c5046a915224a3e09be37505 100644
--- a/Source/core/editing/ReplaceSelectionCommand.cpp
+++ b/Source/core/editing/ReplaceSelectionCommand.cpp
@@ -182,7 +182,7 @@ ReplacementFragment::ReplacementFragment(Document* document, DocumentFragment* f
     }
 
     RefPtrWillBeRawPtr<Range> range = VisibleSelection::selectionFromContentsOfNode(holder.get()).toNormalizedRange();
-    String text = plainText(range.get(), static_cast<TextIteratorBehavior>(TextIteratorEmitsOriginalText | TextIteratorIgnoresStyleVisibility));
+    String text = range ? plainText(range.get(), static_cast<TextIteratorBehavior>(TextIteratorEmitsOriginalText | TextIteratorIgnoresStyleVisibility)) : emptyString();

[hajimehoshi, 2015/06/30 05:02:55]

Does this mean plainText always accept non-null range? If so, plainText should
have const Range& parameter instead of const Range*.

[yosin_UTC9, 2015/06/30 05:04:54]

Another patch will remove |plainText(Range*)| API for Oilpan friendly.

 
     removeInterchangeNodes(holder.get());
     removeUnrenderedNodes(holder.get());