Add experiment to exercise AffiliationService with dummy data, plus add related UMA histograms.

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 167 matching lines @@
 bool IsAffiliationBasedMatchingEnabled(const base::CommandLine& command_line);
 
 // Returns whether or not propagating password changes to affiliated saved web
 // credentials is enabled via variation parameters. This allows disabling only
 // the sub-feature while leaving the rest of the affiliation-based matching
 // enabled. If the main feature is forced enabled/disabled via the command line,
 // the sub-feature will be force enabled/disabled correspondingly.
 bool IsPropagatingPasswordChangesToWebCredentialsEnabled(
     const base::CommandLine& command_line);
 
+// Returns whether or not affiliation requests for dummy facets should be
+// triggered as part of an experiment to exercise AffiliationService code before
+// users would get a chance to have any real Android-based credentials. If the
+// main feature is forced enabled/disabled via the command line, the experiment
+// is force enabled/disabled correspondingly.
+bool IsAffiliationRequestsForDummyFacetsEnabled(
+    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_