Establish components/autofill and move some files

components/autofill/common/web_element_descriptor.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CHROME_COMMON_AUTOFILL_WEB_ELEMENT_DESCRIPTOR_H_
-#define CHROME_COMMON_AUTOFILL_WEB_ELEMENT_DESCRIPTOR_H_
+#ifndef COMPONENTS_AUTOFILL_COMMON_WEB_ELEMENT_DESCRIPTOR_H_
+#define COMPONENTS_AUTOFILL_COMMON_WEB_ELEMENT_DESCRIPTOR_H_
 
 #include <string>
 
 namespace autofill {
 
 // Holds information that can be used to retrieve an element.
 struct WebElementDescriptor {
   enum RetrievalMethod {
     CSS_SELECTOR,
     ID,
     NONE,
   };
 
   WebElementDescriptor();
 
   // Information to retrieve element with.
   std::string descriptor;
 
   // Which retrieval method to use.
   RetrievalMethod retrieval_method;
 };
 
 }  // namespace autofill
 
-#endif  // CHROME_COMMON_AUTOFILL_WEB_ELEMENT_DESCRIPTOR_H_
+#endif  // COMPONENTS_AUTOFILL_COMMON_WEB_ELEMENT_DESCRIPTOR_H_