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

ash/display/shared_display_edge_indicator.cc

Index: ash/display/shared_display_edge_indicator.cc
diff --git a/ash/display/shared_display_edge_indicator.cc b/ash/display/shared_display_edge_indicator.cc
index bf2c047b3e9ec70b859959011e99154c28cfa0a6..5be5d25359bfa8b98fc7c5a20ecc027631eb8720 100644
--- a/ash/display/shared_display_edge_indicator.cc
+++ b/ash/display/shared_display_edge_indicator.cc
@@ -49,7 +49,7 @@ views::Widget* CreateWidget(const gfx::Rect& bounds,
   views::Widget* widget = new views::Widget;
   views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
   params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
-  params.can_activate = false;
+  params.activatable = views::Widget::InitParams::ACTIVATABLE_NO;
   params.keep_on_top = true;
   // We set the context to the primary root window; this is OK because the ash
   // stacking controller will still place us in the correct RootWindow.