Exclude extension settings strings for platforms that don't have extensions.

chrome/browser/ui/cocoa/extensions/extension_installed_bubble_controller.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/ui/cocoa/extensions/extension_installed_bubble_controller.h"
 
 #include "base/i18n/rtl.h"
 #include "base/mac/bundle_locations.h"
 #include "base/mac/mac_util.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 422 matching lines @@
       newWindowHeight += extension_installed_bubble::kInnerVerticalMargin;
 
     return newWindowHeight;
   }
 
   int sync_promo_height = 0;
   if ([self showSyncPromo]) {
     // First calculate the height of the sign-in promo.
     NSFont* font = [NSFont systemFontOfSize:[NSFont smallSystemFontSize]];
 
-    NSString* link(l10n_util::GetNSStringFWithFixup(
-        IDS_EXTENSION_INSTALLED_SIGNIN_PROMO_LINK,
-        l10n_util::GetStringUTF16(IDS_SHORT_PRODUCT_NAME)));
+    NSString* link(l10n_util::GetNSStringWithFixup(
+        IDS_EXTENSION_INSTALLED_SIGNIN_PROMO_LINK));
     NSString* message(l10n_util::GetNSStringWithFixup(
         IDS_EXTENSION_INSTALLED_SIGNIN_PROMO));
 
     HyperlinkTextView* view = promo_.get();
     [view setMessageAndLink:message
                    withLink:link
                    atOffset:0
                        font:font
                messageColor:[NSColor blackColor]
                   linkColor:gfx::SkColorToCalibratedNSColor(
@@ skipping 240 matching lines @@
   ExtensionInstallUI::OpenAppInstalledUI(browser_->profile(), extension_->id());
 }
 
 - (void)awakeFromNib {
   if (bundle_)
     return;
   [self initializeLabel];
 }
 
 @end