Add context to gfx::Screen calls in support of simultaneous desktop+ash

ash/launcher/overflow_bubble.cc

Index: ash/launcher/overflow_bubble.cc
diff --git a/ash/launcher/overflow_bubble.cc b/ash/launcher/overflow_bubble.cc
index 6489583e3f5a2f3937dcce7991376c85415cd5c2..c2b12369100df069b4b8c65097e11e194ac6b45e 100644
--- a/ash/launcher/overflow_bubble.cc
+++ b/ash/launcher/overflow_bubble.cc
@@ -8,6 +8,7 @@
 
 #include "ash/launcher/launcher_types.h"
 #include "ash/launcher/launcher_view.h"
+#include "ash/shell.h"
 #include "ui/gfx/insets.h"
 #include "ui/gfx/screen.h"
 #include "ui/views/bubble/bubble_delegate.h"
@@ -146,6 +147,7 @@ gfx::Size OverflowBubbleView::GetPreferredSize() {
   gfx::Size preferred_size = GetContentsSize();
 
   const gfx::Rect monitor_rect = gfx::Screen::GetDisplayNearestPoint(
+      ash::Shell::GetRootNativeView(),
       GetAnchorRect().CenterPoint()).work_area();
   if (!monitor_rect.IsEmpty()) {
     if (is_horizontal_alignment()) {
@@ -216,7 +218,7 @@ gfx::Rect OverflowBubbleView::GetBubbleBounds() {
       false);
 
   gfx::Rect monitor_rect = gfx::Screen::GetDisplayNearestPoint(
-      anchor_rect.CenterPoint()).work_area();
+      ash::Shell::GetRootNativeView(), anchor_rect.CenterPoint()).work_area();
 
   int offset = 0;
   if (views::BubbleBorder::is_arrow_on_horizontal(arrow_location())) {