Add FakeAffiliationFetcher and factory.

components/password_manager/core/browser/affiliation_fetcher.cc

Index: components/password_manager/core/browser/affiliation_fetcher.cc
diff --git a/components/password_manager/core/browser/affiliation_fetcher.cc b/components/password_manager/core/browser/affiliation_fetcher.cc
index 89139e54f18812295c626c52fb11a50f98f3a23c..92af8c41dd99d7a7aeb3117ee3944dd8edc25523 100644
--- a/components/password_manager/core/browser/affiliation_fetcher.cc
+++ b/components/password_manager/core/browser/affiliation_fetcher.cc
@@ -6,6 +6,7 @@
 
 #include "components/password_manager/core/browser/affiliation_api.pb.h"
 #include "components/password_manager/core/browser/affiliation_utils.h"
+#include "components/password_manager/core/browser/test_affiliation_fetcher_factory.h"
 #include "google_apis/google_api_keys.h"
 #include "net/base/load_flags.h"
 #include "net/base/url_util.h"
@@ -16,6 +17,8 @@
 
 namespace password_manager {
 
+static TestAffiliationFetcherFactory* g_testing_factory = nullptr;
+
 AffiliationFetcher::AffiliationFetcher(
     net::URLRequestContextGetter* request_context_getter,
     const std::vector<FacetURI>& facet_uris,
@@ -36,9 +39,19 @@ AffiliationFetcher* AffiliationFetcher::Create(
     net::URLRequestContextGetter* context_getter,
     const std::vector<FacetURI>& facet_uris,
     AffiliationFetcherDelegate* delegate) {
+  if (g_testing_factory) {
+    return g_testing_factory->CreateInstance(context_getter, facet_uris,
+                                             delegate);
+  }
   return new AffiliationFetcher(context_getter, facet_uris, delegate);
 }
 
+// static
+void AffiliationFetcher::SetFactoryForTesting(
+    TestAffiliationFetcherFactory* factory) {
+  g_testing_factory = factory;
+}
+
 void AffiliationFetcher::StartRequest() {
   DCHECK(!fetcher_);