Emit object replacement char to IME

Source/core/editing/PlainTextRange.h

Index: Source/core/editing/PlainTextRange.h
diff --git a/Source/core/editing/PlainTextRange.h b/Source/core/editing/PlainTextRange.h
index d3e2617a66612dadab714aefd13d5a02dc60bc19..ba583ce06dd410d4fda647bfea0687392e99229b 100644
--- a/Source/core/editing/PlainTextRange.h
+++ b/Source/core/editing/PlainTextRange.h
@@ -51,13 +51,14 @@ public:
 
     PassRefPtrWillBeRawPtr<Range> createRange(const ContainerNode& scope) const;
     PassRefPtrWillBeRawPtr<Range> createRangeForSelection(const ContainerNode& scope) const;
+    PassRefPtrWillBeRawPtr<Range> createRangeForInputMethod(const ContainerNode& scope) const;
 
     static PlainTextRange create(const Node& scope, const Range&);
 
 private:
     PlainTextRange& operator=(const PlainTextRange&)  WTF_DELETED_FUNCTION;
 
-    enum GetRangeFor { ForGeneric, ForSelection };
+    enum GetRangeFor { ForGeneric, ForSelection, ForInputMethod };
     PassRefPtrWillBeRawPtr<Range> createRangeFor(const ContainerNode& scope, GetRangeFor) const;
 
     const size_t m_start;