Remove logic to reset input method more than needed

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

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 53 matching lines @@
     bool commitText(const String& text, int relativeCaretPosition);
 
     // Inserts ongoing composing text; changes the selection to the end of
     // the inserting text if DoNotKeepSelection, or holds the selection if
     // KeepSelection.
     bool finishComposingText(ConfirmCompositionBehavior);
 
     // Deletes the existing composition text.
     void cancelComposition();
 
-    void cancelCompositionIfSelectionIsInvalid();
     EphemeralRange compositionEphemeralRange() const;
     Range* compositionRange() const;
 
     void clear();
     void documentDetached();
 
     PlainTextRange getSelectionOffsets() const;
     // Returns true if setting selection to specified offsets, otherwise false.
     bool setEditableSelectionOffsets(const PlainTextRange&, FrameSelection::SetSelectionOptions = FrameSelection::CloseTyping);
     void extendSelectionAndDelete(int before, int after);
     PlainTextRange createRangeForSelection(int start, int end, size_t textLength) const;
 
 private:
     Member<LocalFrame> m_frame;
     Member<Range> m_compositionRange;
     bool m_isDirty;
-    bool m_hasComposition;
 
     explicit InputMethodController(LocalFrame&);
 
     Editor& editor() const;
     LocalFrame& frame() const
     {
         DCHECK(m_frame);
         return *m_frame;
     }
 
@@ skipping 11 matching lines @@
     // and moves caret. Returns true if did replace and moved caret successfully.
     bool replaceCompositionAndMoveCaret(const String&, int relativeCaretPosition);
 
     // Returns true if moved caret successfully.
     bool moveCaret(int newCaretPosition);
 };
 
 } // namespace blink
 
 #endif // InputMethodController_h