Don't suggest autofill profiles that are subsets of other profiles.

components/autofill/core/browser/autofill_profile.h

 // 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.
 
 #ifndef COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_PROFILE_H_
 #define COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_PROFILE_H_
 
 #include <stddef.h>
 
 #include <iosfwd>
@@ skipping 104 matching lines @@
   // Returns concatenation of full name and address line 1.  This acts as the
   // basis of comparison for new values that are submitted through forms to
   // aid with correct aggregation of new data.
   const base::string16 PrimaryValue() const;
 
   // Returns true if the data in this AutofillProfile is a subset of the data in
   // |profile|.
   bool IsSubsetOf(const AutofillProfile& profile,
                   const std::string& app_locale) const;
 
+  // Like IsSubsetOf, but only considers the types present in |types|.
+  bool IsSubsetOfForFieldSet(const AutofillProfile& profile,
+                             const std::string& app_locale,
+                             const ServerFieldTypeSet& types) const;
+
   // Overwrites the single-valued field data in |profile| with this
   // Profile.  Or, for multi-valued fields append the new values.
   void OverwriteWithOrAddTo(const AutofillProfile& profile,
                             const std::string& app_locale);
 
   // Sets |name_| to the user-input values in |names|, but uses names in |from|
   // as a starting point. If the full names are equivalent, the parsing in
   // |from| will take precedence. |from| can be null.
   void CopyAndUpdateNameList(const std::vector<base::string16> names,
                              const AutofillProfile* from,
@@ skipping 116 matching lines @@
   // ID assigned by the server. This will be set only for WALLET_PROFILEs.
   std::string server_id_;
 };
 
 // So we can compare AutofillProfiles with EXPECT_EQ().
 std::ostream& operator<<(std::ostream& os, const AutofillProfile& profile);
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_PROFILE_H_