Remove shouldUseInputMethod

Source/core/html/forms/TextFieldInputType.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2011 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 362 matching lines @@
 {
     if (SpinButtonElement* spinButton = spinButtonElement())
         spinButton->releaseCapture();
 }
 
 bool TextFieldInputType::supportsReadOnly() const
 {
     return true;
 }
 
-bool TextFieldInputType::shouldUseInputMethod() const
-{
-    return true;
-}
-
 static bool isASCIILineBreak(UChar c)
 {
     return c == '\r' || c == '\n';
 }
 
 static String limitLength(const String& string, unsigned maxLength)
 {
     unsigned newLength = std::min(maxLength, string.length());
     if (newLength == string.length())
         return string;
@@ skipping 156 matching lines @@
     return shouldSpinButtonRespondToMouseEvents() && element().focused();
 }
 
 void TextFieldInputType::spinButtonDidReleaseMouseCapture(SpinButtonElement::EventDispatch eventDispatch)
 {
     if (eventDispatch == SpinButtonElement::EventDispatchAllowed)
         element().dispatchFormControlChangeEvent();
 }
 
 } // namespace blink