Remove Shell::shelf()|status_area_widget()|launcher()

ash/wm/workspace/frame_maximize_button.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 "ash/wm/workspace/frame_maximize_button.h"
 
 #include "ash/launcher/launcher.h"
 #include "ash/screen_ash.h"
 #include "ash/shell.h"
 #include "ash/wm/maximize_bubble_controller.h"
@@ skipping 459 matching lines @@
     case SNAP_LEFT:
     case SNAP_RIGHT:
       return ScreenAsh::ConvertRectToScreen(
           frame_->GetWidget()->GetNativeView()->parent(),
           snap_sizer.target_bounds());
     case SNAP_MAXIMIZE:
       return ScreenAsh::ConvertRectToScreen(
           window->parent(),
           ScreenAsh::GetMaximizedWindowBoundsInParent(window));
     case SNAP_MINIMIZE: {
-      Launcher* launcher = Shell::GetInstance()->launcher();
+      Launcher* launcher = Launcher::ForWindow(window);
+      // Launcher is created lazily and can be NULL.
+      if (!launcher)
+        return gfx::Rect();
       gfx::Rect item_rect(launcher->GetScreenBoundsOfItemIconForWindow(
           window));
       if (!item_rect.IsEmpty()) {
         // PhantomWindowController insets slightly, outset it so the phantom
         // doesn't appear inset.
         item_rect.Inset(-8, -8);
         return item_rect;
       }
       return launcher->widget()->GetWindowBoundsInScreen();
     }
@@ skipping 83 matching lines @@
     return FRAME_STATE_SNAP_LEFT;
   if (bounds.right() == screen.right())
     return FRAME_STATE_SNAP_RIGHT;
   // If we come here, it is likely caused by the fact that the
   // "VerticalResizeDoubleClick" stored a restore rectangle. In that case
   // we allow all maximize operations (and keep the restore rectangle).
   return FRAME_STATE_NONE;
 }
 
 }  // namespace ash