Fixes for -Wunused-function on Linux, Android and ChromeOS

chrome/browser/chromeos/login/login_display_host_impl.cc

 // 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.
 
 #include "chrome/browser/chromeos/login/login_display_host_impl.h"
 
 #include <vector>
 
 #include "ash/desktop_background/desktop_background_controller.h"
 #include "ash/desktop_background/user_wallpaper_delegate.h"
@@ skipping 132 matching lines @@
     PrefService* prefs = g_browser_process->local_state();
     prefs->SetString(prefs::kHardwareKeyboardLayout, layout);
     // This asks the file thread to save the prefs (i.e. doesn't block).
     // The latest values of Local State reside in memory so we can safely
     // get the value of kHardwareKeyboardLayout even if the data is not
     // yet saved to disk.
     prefs->CommitPendingWrite();
   }
 }
 
-ui::Layer* GetLayer(views::Widget* widget) {
-  return widget->GetNativeView()->layer();
-}
-
 // A class to observe an implicit animation and invokes the callback after the
 // animation is completed.
 class AnimationObserver : public ui::ImplicitAnimationObserver {
  public:
   explicit AnimationObserver(const base::Closure& callback)
       : callback_(callback) {}
   virtual ~AnimationObserver() {}
 
  private:
   // ui::ImplicitAnimationObserver implementation:
@@ skipping 989 matching lines @@
   VLOG(1) << "Initial time zone: " << timezone_name;
   // Apply locale customizations only once to preserve whatever locale
   // user has changed to during OOBE.
   if (!timezone_name.empty()) {
     chromeos::system::TimezoneSettings::GetInstance()->SetTimezoneFromID(
         UTF8ToUTF16(timezone_name));
   }
 }
 
 }  // namespace chromeos