Move shadow code to views\corewm

ash/shell.h

Index: ash/shell.h
===================================================================
--- ash/shell.h	(revision 167460)
+++ ash/shell.h	(working copy)
@@ -55,6 +55,7 @@
 namespace corewm {
 class CompoundEventFilter;
 class InputMethodEventFilter;
+class ShadowController;
 }
 }
 
@@ -97,7 +98,6 @@
 class RootWindowController;
 class RootWindowLayoutManager;
 class ScreenPositionController;
-class ShadowController;
 class SlowAnimationEventFilter;
 class StackingController;
 class StatusAreaWidget;
@@ -381,7 +381,7 @@
   }
 
   // Made available for tests.
-  internal::ShadowController* shadow_controller() {
+  views::corewm::ShadowController* shadow_controller() {
     return shadow_controller_.get();
   }
 
@@ -469,7 +469,7 @@
   scoped_ptr<internal::WindowModalityController> window_modality_controller_;
   scoped_ptr<internal::DragDropController> drag_drop_controller_;
   scoped_ptr<internal::ResizeShadowController> resize_shadow_controller_;
-  scoped_ptr<internal::ShadowController> shadow_controller_;
+  scoped_ptr<views::corewm::ShadowController> shadow_controller_;
   scoped_ptr<internal::TooltipController> tooltip_controller_;
   scoped_ptr<internal::VisibilityController> visibility_controller_;
   scoped_ptr<DesktopBackgroundController> desktop_background_controller_;