change WebViewImpl::inputModeOfFocusedElement to return lowered string.

public/web/WebTextInputInfo.h

 /*
  * Copyright (C) 2011 Google 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
@@ skipping 34 matching lines @@
     // if nothing is selected.
     int selectionEnd;
 
     // The start position of the current composition, or -1 if there is none.
     int compositionStart;
 
     // The end position of the current composition, or -1 if there is none.
     int compositionEnd;
 
     // The inputmode attribute value of the currently focused input field.
+    // This string is lower-case.
     WebString inputMode;
 
     WEBKIT_EXPORT bool equals(const WebTextInputInfo&) const;
 
     WebTextInputInfo()
         : type(WebTextInputTypeNone)
         , selectionStart(0)
         , selectionEnd(0)
         , compositionStart(-1)
         , compositionEnd(-1)
     {
     }
 };
 
 inline bool operator==(const WebTextInputInfo& a, const WebTextInputInfo& b)
 {
     return a.equals(b);
 }
 
 inline bool operator!=(const WebTextInputInfo& a, const WebTextInputInfo& b)
 {
     return !(a == b);
 }
 
 } // namespace WebKit
 
 #endif