Add instrumentation for password autofill and Credential Manager API user flows.

components/password_manager/content/browser/credential_manager_impl.cc

 // 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.
 
 #include "components/password_manager/content/browser/credential_manager_impl.h"
 
 #include <utility>
 
 #include "base/bind.h"
+#include "base/metrics/user_metrics.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/autofill/core/common/password_form.h"
 #include "components/password_manager/content/browser/content_password_manager_driver.h"
 #include "components/password_manager/content/browser/content_password_manager_driver_factory.h"
 #include "components/password_manager/content/public/cpp/type_converters.h"
 #include "components/password_manager/core/browser/affiliated_match_helper.h"
 #include "components/password_manager/core/browser/password_manager_client.h"
 #include "components/password_manager/core/browser/password_store.h"
 #include "components/password_manager/core/common/credential_manager_types.h"
@@ skipping 223 matching lines @@
             : CredentialType::CREDENTIAL_TYPE_FEDERATED;
     info = CredentialInfo(*form, type_to_return);
     if (PasswordStore* store = GetPasswordStore()) {
       if (form->skip_zero_click && IsZeroClickAllowed()) {
         DCHECK(IsUpdatingCredentialAllowed());
         autofill::PasswordForm update_form = *form;
         update_form.skip_zero_click = false;
         store->UpdateLogin(update_form);
       }
     }
+    base::RecordAction(
+        base::UserMetricsAction("CredentialManager_AccountChooser_Accepted"));
+  } else {
+    base::RecordAction(
+        base::UserMetricsAction("CredentialManager_AccountChooser_Dismissed"));
   }
   SendCredential(send_callback, info);
 }
 
 PasswordManagerClient* CredentialManagerImpl::client() const {
   return client_;
 }
 
 autofill::PasswordForm CredentialManagerImpl::GetSynthesizedFormForOrigin()
     const {
@@ skipping 10 matching lines @@
   DCHECK(pending_require_user_mediation_);
   pending_require_user_mediation_.reset();
 }
 
 bool CredentialManagerImpl::IsUpdatingCredentialAllowed() const {
   return !client_->DidLastPageLoadEncounterSSLErrors() &&
          !client_->IsOffTheRecord();
 }
 
 }  // namespace password_manager