Use ICU plural syntax in more place

chrome/browser/app_controller_mac.mm

 // Copyright (c) 2012 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.
 
 #import "chrome/browser/app_controller_mac.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
@@ skipping 789 matching lines @@
 
 // Helper function for populating and displaying the in progress downloads at
 // exit alert panel.
 - (BOOL)userWillWaitForInProgressDownloads:(int)downloadCount {
   NSString* titleText = nil;
   NSString* explanationText = nil;
   NSString* waitTitle = nil;
   NSString* exitTitle = nil;
 
   // Set the dialog text based on whether or not there are multiple downloads.
-  if (downloadCount == 1) {
-    // Dialog text: warning and explanation.
-    titleText = l10n_util::GetNSString(
-        IDS_SINGLE_DOWNLOAD_REMOVE_CONFIRM_TITLE);
-    explanationText = l10n_util::GetNSString(
-        IDS_SINGLE_DOWNLOAD_REMOVE_CONFIRM_EXPLANATION);
-  } else {
-    // Dialog text: warning and explanation.
-    titleText = l10n_util::GetNSString(
-        IDS_MULTIPLE_DOWNLOADS_REMOVE_CONFIRM_TITLE);
-    explanationText = l10n_util::GetNSString(
-        IDS_MULTIPLE_DOWNLOADS_REMOVE_CONFIRM_EXPLANATION);
-  }
+  // Dialog text: warning and explanation.
+  titleText = l10n_util::GetPluralNSStringF(
+      IDS_DOWNLOAD_REMOVE_CONFIRM_TITLE, downloadCount);
+  explanationText = l10n_util::GetPluralNSStringF(
+      IDS_DOWNLOAD_REMOVE_CONFIRM_EXPLANATION, downloadCount);
   // Cancel download and exit button text.
-  exitTitle = l10n_util::GetNSString(
-      IDS_DOWNLOAD_REMOVE_CONFIRM_OK_BUTTON_LABEL);
+  exitTitle = l10n_util::GetPluralNSStringF(
+      IDS_DOWNLOAD_REMOVE_CONFIRM_OK_BUTTON_LABEL, downloadCount);
 
   // Wait for download button text.
-  waitTitle = l10n_util::GetNSString(
-      IDS_DOWNLOAD_REMOVE_CONFIRM_CANCEL_BUTTON_LABEL);
+  waitTitle = l10n_util::GetPluralNSStringF(
+      IDS_DOWNLOAD_REMOVE_CONFIRM_CANCEL_BUTTON_LABEL, downloadCount);
 
   // 'waitButton' is the default choice.
   int choice = NSRunAlertPanel(titleText, @"%@",
                                waitTitle, exitTitle, nil, explanationText);
   return choice == NSAlertDefaultReturn ? YES : NO;
 }
 
 // Check all profiles for in progress downloads, and if we find any, prompt the
 // user to see if we should continue to exit (and thus cancel the downloads), or
 // if we should wait.
@@ skipping 872 matching lines @@
 
 //---------------------------------------------------------------------------
 
 namespace app_controller_mac {
 
 bool IsOpeningNewWindow() {
   return g_is_opening_new_window;
 }
 
 }  // namespace app_controller_mac