Workaround for setComposition styling clobber

third_party/WebKit/Source/core/editing/InputMethodController.h

Index: third_party/WebKit/Source/core/editing/InputMethodController.h
diff --git a/third_party/WebKit/Source/core/editing/InputMethodController.h b/third_party/WebKit/Source/core/editing/InputMethodController.h
index 45cb715a0092acba96107a909f9e88c68717d29c..1238c78bf75c9f52d83f4848d09d7837894b09f7 100644
--- a/third_party/WebKit/Source/core/editing/InputMethodController.h
+++ b/third_party/WebKit/Source/core/editing/InputMethodController.h
@@ -115,6 +115,9 @@ private:
 
     // Returns true if moved caret successfully.
     bool moveCaret(int newCaretPosition);
+
+    size_t computeCommonGraphemeClusterPrefixLengthForSetComposition(const String& newText) const;

[yosin_UTC9, 2016/10/04 09:00:05]

Do we really need to have
|computeCommonGraphemeClusterPrefixLengthForSetComposition()| as member
function?
It seems we can have this function as static non-member function and pass root
editable element.

[yabinh, 2016/10/11 01:42:22]

Done.

+    PlainTextRange createSelectionRangeForSetComposition(int selectionStart, int selectionEnd, size_t textLength) const;
 };
 
 } // namespace blink