[Refactor] Consolidate the logic for whether a widget can be activated.

ui/views/widget/desktop_aura/desktop_native_widget_aura.cc

Index: ui/views/widget/desktop_aura/desktop_native_widget_aura.cc
diff --git a/ui/views/widget/desktop_aura/desktop_native_widget_aura.cc b/ui/views/widget/desktop_aura/desktop_native_widget_aura.cc
index d7347d008257c90ea2aa568c9c466cebf935ec6e..3a3a9dd6a20257b75c7f6dcfc4e4f6e15e8f0d83 100644
--- a/ui/views/widget/desktop_aura/desktop_native_widget_aura.cc
+++ b/ui/views/widget/desktop_aura/desktop_native_widget_aura.cc
@@ -94,7 +94,9 @@ class DesktopNativeWidgetTopLevelHandler : public aura::WindowObserver {
     init_params.bounds = bounds;
     init_params.ownership = Widget::InitParams::NATIVE_WIDGET_OWNS_WIDGET;
     init_params.layer_type = aura::WINDOW_LAYER_NOT_DRAWN;
-    init_params.can_activate = full_screen;
+    init_params.activatable = full_screen ?
+        Widget::InitParams::ACTIVATABLE_YES :
+        Widget::InitParams::ACTIVATABLE_NO;
     init_params.keep_on_top = root_is_always_on_top;
 
     // This widget instance will get deleted when the window is
@@ -250,7 +252,6 @@ DesktopNativeWidgetAura::DesktopNativeWidgetAura(
     : desktop_window_tree_host_(NULL),
       ownership_(Widget::InitParams::NATIVE_WIDGET_OWNS_WIDGET),
       close_widget_factory_(this),
-      can_activate_(true),
       content_window_container_(NULL),
       content_window_(new aura::Window(this)),
       native_widget_delegate_(delegate),
@@ -1049,7 +1050,7 @@ void DesktopNativeWidgetAura::OnGestureEvent(ui::GestureEvent* event) {
 // DesktopNativeWidgetAura, aura::client::ActivationDelegate implementation:
 
 bool DesktopNativeWidgetAura::ShouldActivate() const {
-  return can_activate_ && native_widget_delegate_->CanActivate();
+  return native_widget_delegate_->CanActivate();
 }
 
 ////////////////////////////////////////////////////////////////////////////////