Make various views SetShape() methods take an unique_ptr.

ui/views/widget/widget.h

 // 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.
 
 #ifndef UI_VIEWS_WIDGET_WIDGET_H_
 #define UI_VIEWS_WIDGET_WIDGET_H_
 
 #include <map>
 #include <memory>
 #include <set>
-#include <stack>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/observer_list.h"
 #include "base/scoped_observer.h"
 #include "build/build_config.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/events/event_source.h"
 #include "ui/gfx/geometry/rect.h"
@@ skipping 30 matching lines @@
 namespace ui {
 class Accelerator;
 class Compositor;
 class DefaultThemeProvider;
 class InputMethod;
 class Layer;
 class NativeTheme;
 class OSExchangeData;
 class ThemeProvider;
 class Window;
-}
+}  // namespace ui
 
 namespace views {
 
 class DesktopWindowTreeHost;
 class NativeWidget;
 class NonClientFrameView;
 class TooltipManager;
 class View;
 class WidgetDelegate;
 class WidgetObserver;
@@ skipping 396 matching lines @@
 
   // Places the widget in front of the specified widget in z-order.
   void StackAboveWidget(Widget* widget);
   void StackAbove(gfx::NativeView native_view);
   void StackAtTop();
 
   // Places the widget below the specified NativeView.
   void StackBelow(gfx::NativeView native_view);
 
   // Sets a shape on the widget. Passing a NULL |shape| reverts the widget to
-  // be rectangular. Takes ownership of |shape|.
-  void SetShape(SkRegion* shape);
+  // be rectangular.
+  void SetShape(std::unique_ptr<SkRegion> shape);
 
   // Hides the widget then closes it after a return to the message loop.
   virtual void Close();
 
   // TODO(beng): Move off public API.
   // Closes the widget immediately. Compare to |Close|. This will destroy the
   // window handle associated with this Widget, so should not be called from
   // any code that expects it to be valid beyond this call.
   void CloseNow();
 
@@ skipping 485 matching lines @@
   bool movement_disabled_;
 
   ScopedObserver<ui::NativeTheme, ui::NativeThemeObserver> observer_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(Widget);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_WIDGET_H_