Fix "unused variable" warnings.

chrome/browser/signin/signin_error_notifier_ash.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 "chrome/browser/signin/signin_error_notifier_ash.h"
 
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
 #include "ash/system/system_notifier.h"
 #include "base/logging.h"
@@ skipping 47 matching lines @@
 
  protected:
   ~SigninNotificationDelegate() override;
 
  private:
   void FixSignIn();
 
   // Unique id of the notification.
   const std::string id_;
 
+#if !defined(OS_CHROMEOS)
   Profile* profile_;
+#endif
 
   DISALLOW_COPY_AND_ASSIGN(SigninNotificationDelegate);
 };
 
-SigninNotificationDelegate::SigninNotificationDelegate(
-    const std::string& id,
-    Profile* profile)
-    : id_(id),
-      profile_(profile) {
+SigninNotificationDelegate::SigninNotificationDelegate(const std::string& id,
+                                                       Profile* profile)
+#if defined(OS_CHROMEOS)
+    : id_(id) {
+#else
+    : id_(id), profile_(profile) {
+#endif
 }
 
 SigninNotificationDelegate::~SigninNotificationDelegate() {
 }
 
 void SigninNotificationDelegate::Click() {
   FixSignIn();
 }
 
 void SigninNotificationDelegate::ButtonClick(int button_index) {
@@ skipping 127 matching lines @@
       return l10n_util::GetStringUTF16(
           IDS_SYNC_UNAVAILABLE_ERROR_BUBBLE_VIEW_MESSAGE);
       break;
 
     // Generic message for "other" errors.
     default:
       return l10n_util::GetStringUTF16(
           IDS_SYNC_OTHER_SIGN_IN_ERROR_BUBBLE_VIEW_MESSAGE);
   }
 }