[Autofill] Add Chrome flag that annotates web forms with form and field signatures

components/autofill/content/renderer/form_autofill_util.cc

 // Copyright 2013 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.
 
 #include "components/autofill/content/renderer/form_autofill_util.h"
 
 #include <map>
 #include <memory>
 #include <set>
 #include <vector>
@@ skipping 84 matching lines @@
 
 bool IsNoScriptElement(const WebElement& element) {
   CR_DEFINE_STATIC_LOCAL(WebString, kNoScript, ("noscript"));
   return element.hasHTMLTagName(kNoScript);
 }
 
 bool HasTagName(const WebNode& node, const blink::WebString& tag) {
   return node.isElementNode() && node.toConst<WebElement>().hasHTMLTagName(tag);
 }
 
-bool IsAutofillableElement(const WebFormControlElement& element) {
-  const WebInputElement* input_element = toWebInputElement(&element);
-  return IsAutofillableInputElement(input_element) ||
-         IsSelectElement(element) ||
-         IsTextAreaElement(element);
-}
-
 bool IsElementInControlElementSet(
     const WebElement& element,
     const std::vector<WebFormControlElement>& control_elements) {
   if (!element.isFormControlElement())
     return false;
   const WebFormControlElement form_control_element =
       element.toConst<WebFormControlElement>();
   return std::find(control_elements.begin(),
                    control_elements.end(),
                    form_control_element) != control_elements.end();
@@ skipping 1190 matching lines @@
 
   return element->isCheckbox() || element->isRadioButton();
 }
 
 bool IsAutofillableInputElement(const WebInputElement* element) {
   return IsTextInput(element) ||
          IsMonthInput(element) ||
          IsCheckableElement(element);
 }
 
+bool IsAutofillableElement(const WebFormControlElement& element) {
+  const WebInputElement* input_element = toWebInputElement(&element);
+  return IsAutofillableInputElement(input_element) ||
+         IsSelectElement(element) || IsTextAreaElement(element);
+}
+
 const base::string16 GetFormIdentifier(const WebFormElement& form) {
   base::string16 identifier = form.name().utf16();
   CR_DEFINE_STATIC_LOCAL(WebString, kId, ("id"));
   if (identifier.empty())
     identifier = form.getAttribute(kId).utf16();
 
   return identifier;
 }
 
 bool IsWebNodeVisible(const blink::WebNode& node) {
@@ skipping 479 matching lines @@
     // Zero selection start is for password manager, which can show usernames
     // that do not begin with the user input value.
     selection_start = (offset == base::string16::npos) ? 0 : offset;
   }
 
   input_element->setSelectionRange(selection_start, suggestion.length());
 }
 
 }  // namespace form_util
 }  // namespace autofill