AutoFill forms. We do this by responding to a message from WebKit which send...

chrome/browser/autofill/form_structure.cc

 // Copyright (c) 2009 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 "chrome/browser/autofill/form_structure.h"
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "base/sha1.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/autofill/field_types.h"
 #include "chrome/browser/autofill/form_field.h"
 #include "third_party/libjingle/files/talk/xmllite/xmlelement.h"
+#include "webkit/glue/form_data.h"
 #include "webkit/glue/form_field.h"
 #include "webkit/glue/form_field_values.h"
 
 const char* kFormMethodGet = "get";
 const char* kFormMethodPost = "post";
 
 // XML attribute names
 const char* const kAttributeClientVersion = "clientversion";
 const char* const kAttributeAutoFillUsed = "autofillused";
 const char* const kAttributeSignature = "signature";
@@ skipping 170 matching lines @@
 
 const AutoFillField* FormStructure::field(int index) const {
   return fields_[index];
 }
 
 size_t FormStructure::field_count() const {
   // Don't count the NULL terminator.
   return fields_.size() - 1;
 }
 
+bool FormStructure::operator!=(const FormData& form) const {
+  // TODO(jhawkins): Is this enough to differentiate a form?
+  if (UTF8ToUTF16(form_name_) != form.name ||
+      source_url_ != form.origin ||
+      target_url_ != form.action) {
+    return true;
+  }
+
+  // TODO(jhawkins): Compare field names, IDs and labels once we have labels
+  // set up.
+
+  return false;
+}
+
 void FormStructure::GetHeuristicFieldInfo(FieldTypeMap* field_type_map) {
   FormFieldSet fields = FormFieldSet(this);
 
   FormFieldSet::const_iterator field;
   for (field = fields.begin(); field != fields.end(); field++) {
     bool ok = (*field)->GetFieldInfo(field_type_map);
     DCHECK(ok);
   }
 }