Make various views SetShape() methods take an unique_ptr.

ui/views/widget/native_widget_aura.cc

Index: ui/views/widget/native_widget_aura.cc
diff --git a/ui/views/widget/native_widget_aura.cc b/ui/views/widget/native_widget_aura.cc
index a2b790bc0d1db9c354bec41b49f85fdcf737c341..1f72f3a80b73b784d387dc4fb401b40ea312b728 100644
--- a/ui/views/widget/native_widget_aura.cc
+++ b/ui/views/widget/native_widget_aura.cc
@@ -448,11 +448,9 @@ void NativeWidgetAura::StackBelow(gfx::NativeView native_view) {
     window_->parent()->StackChildBelow(window_, native_view);
 }
 
-void NativeWidgetAura::SetShape(SkRegion* region) {
+void NativeWidgetAura::SetShape(std::unique_ptr<SkRegion> region) {
   if (window_)
-    window_->layer()->SetAlphaShape(base::WrapUnique(region));
-  else
-    delete region;
+    window_->layer()->SetAlphaShape(std::move(region));
 }
 
 void NativeWidgetAura::Close() {