Add separate UMA histograms for the account chooser with 1/many accounts.

chrome/browser/ui/passwords/password_dialog_controller_impl.cc

 // Copyright 2016 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 "chrome/browser/ui/passwords/password_dialog_controller_impl.h"
 
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sync/profile_sync_service_factory.h"
 #include "chrome/browser/ui/passwords/manage_passwords_view_utils.h"
 #include "chrome/browser/ui/passwords/password_dialog_prompts.h"
@@ skipping 94 matching lines @@
   return result;
 }
 
 void PasswordDialogControllerImpl::OnSmartLockLinkClicked() {
   delegate_->NavigateToSmartLockHelpPage();
 }
 
 void PasswordDialogControllerImpl::OnChooseCredentials(
     const autofill::PasswordForm& password_form,
     password_manager::CredentialType credential_type) {
-  password_manager::metrics_util::LogAccountChooserUserAction(
-      password_manager::metrics_util::ACCOUNT_CHOOSER_CREDENTIAL_CHOSEN);
+  if (local_credentials_.size() == 1) {
+    password_manager::metrics_util::LogAccountChooserUserActionOneAccount(
+        password_manager::metrics_util::ACCOUNT_CHOOSER_CREDENTIAL_CHOSEN);
+  } else {
+    password_manager::metrics_util::LogAccountChooserUserActionManyAccounts(
+        password_manager::metrics_util::ACCOUNT_CHOOSER_CREDENTIAL_CHOSEN);
+  }
   ResetDialog();
   delegate_->ChooseCredential(password_form, credential_type);
 }
 
 void PasswordDialogControllerImpl::OnSignInClicked() {
   DCHECK_EQ(1u, local_credentials_.size());
-  password_manager::metrics_util::LogAccountChooserUserAction(
+  password_manager::metrics_util::LogAccountChooserUserActionOneAccount(
       password_manager::metrics_util::ACCOUNT_CHOOSER_SIGN_IN);
   ResetDialog();
   delegate_->ChooseCredential(
       *local_credentials_[0],
       password_manager::CredentialType::CREDENTIAL_TYPE_PASSWORD);
 }
 
 void PasswordDialogControllerImpl::OnAutoSigninOK() {
   password_bubble_experiment::RecordAutoSignInPromptFirstRunExperienceWasShown(
       profile_->GetPrefs());
   password_manager::metrics_util::LogAutoSigninPromoUserAction(
       password_manager::metrics_util::AUTO_SIGNIN_OK_GOT_IT);
   ResetDialog();
   OnCloseDialog();
 }
 
 void PasswordDialogControllerImpl::OnAutoSigninTurnOff() {
   profile_->GetPrefs()->SetBoolean(
       password_manager::prefs::kCredentialsEnableAutosignin, false);
   password_bubble_experiment::RecordAutoSignInPromptFirstRunExperienceWasShown(
       profile_->GetPrefs());
   password_manager::metrics_util::LogAutoSigninPromoUserAction(
       password_manager::metrics_util::AUTO_SIGNIN_TURN_OFF);
   ResetDialog();
   OnCloseDialog();
 }
 
 void PasswordDialogControllerImpl::OnCloseDialog() {
   if (account_chooser_dialog_) {
-    password_manager::metrics_util::LogAccountChooserUserAction(
-        password_manager::metrics_util::ACCOUNT_CHOOSER_DISMISSED);
+    if (local_credentials_.size() == 1) {
+      password_manager::metrics_util::LogAccountChooserUserActionOneAccount(
+          password_manager::metrics_util::ACCOUNT_CHOOSER_DISMISSED);
+    } else {
+      password_manager::metrics_util::LogAccountChooserUserActionManyAccounts(
+          password_manager::metrics_util::ACCOUNT_CHOOSER_DISMISSED);
+    }
     account_chooser_dialog_ = nullptr;
   }
   if (autosignin_dialog_) {
     password_manager::metrics_util::LogAutoSigninPromoUserAction(
         password_manager::metrics_util::AUTO_SIGNIN_NO_ACTION);
     autosignin_dialog_ = nullptr;
   }
   delegate_->OnDialogHidden();
 }
 
 void PasswordDialogControllerImpl::ResetDialog() {
   if (account_chooser_dialog_) {
     account_chooser_dialog_->ControllerGone();
     account_chooser_dialog_ = nullptr;
   }
   if (autosignin_dialog_) {
     autosignin_dialog_->ControllerGone();
     autosignin_dialog_ = nullptr;
   }
 }