Add flag to enable/disable affiliaton based matching.

components/password_manager/core/browser/affiliation_utils.h

 // Copyright 2014 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.
 
 // This file contains utilities related to working with "facets".
 //
 // A "facet" is defined as the manifestation of a logical application on a given
 // platform. For example, "My Bank" may have released an Android application
 // and a Web application accessible from a browser. These are all facets of the
 // "My Bank" logical application.
@@ skipping 35 matching lines @@
 
 #include <iosfwd>
 #include <string>
 #include <vector>
 
 #include "base/containers/hash_tables.h"
 #include "base/logging.h"
 #include "base/time/time.h"
 #include "url/url_parse.h"
 
+namespace base {
+class CommandLine;
+}  // namespace base
+
 namespace password_manager {
 
 // Encapsulates a facet URI in canonical form.
 //
 // This is a very light-weight wrapper around an std::string containing the text
 // of the URI, and can be passed around as a value. The main rationale for the
 // existance of this class is to make it clearer in the code when a certain URI
 // is known to be a valid facet URI in canonical form, and to allow verifying
 // and converting URIs to such canonical form.
 //
@@ skipping 88 matching lines @@
   base::Time last_update_time;
 };
 
 // Returns whether or not equivalence classes |a| and |b| are equal, that is,
 // whether or not they consist of the same set of facets.
 //
 // Note that this will do some sorting, so it can be expensive for large inputs.
 bool AreEquivalenceClassesEqual(const AffiliatedFacets& a,
                                 const AffiliatedFacets& b);
 
+// Returns whether or not affiliation based matching is enabled, either via
+// command line flags or field trials. The command line flag, if present, always
+// takes precedence.
+bool IsAffiliationBasedMatchingEnabled(const base::CommandLine& command_line);
+
 // For logging use only.
 std::ostream& operator<<(std::ostream& os, const FacetURI& facet_uri);
 
 }  // namespace password_manager
 
 // Provide a hash function so that hash_sets and maps can contain FacetURIs.
 namespace BASE_HASH_NAMESPACE {
 
 template <>
 struct hash<password_manager::FacetURI> {
   size_t operator()(const password_manager::FacetURI& facet_uri) const {
     return hash<std::string>()(facet_uri.potentially_invalid_spec());
   }
 };
 
 }  // namespace BASE_HASH_NAMESPACE
 
 #endif  // COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_AFFILIATION_UTILS_H_