cleanup: Use IsTextInputTypeNone() in OnInputMethodChanged().

BUG=None
TEST=None


Review URL: http://codereview.chromium.org/8986010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@116461 0039d316-1c4b-4281-b951-d872f2087c98
bool InputMethodBase::IsTextInputTypeNone() const {
  return GetTextInputType() == TEXT_INPUT_TYPE_NONE;
}

bool InputMethodBase::IsTextInputTypeNone() const {
  return GetTextInputType() == TEXT_INPUT_TYPE_NONE;
}
