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

ui/gfx/screen_mac.mm

Index: ui/gfx/screen_mac.mm
diff --git a/ui/gfx/screen_mac.mm b/ui/gfx/screen_mac.mm
index 325c679209d52523ba4d7927768e52384a6d2e13..ef1a2e3218df04a1646d86e05ef735aa50ef64db 100644
--- a/ui/gfx/screen_mac.mm
+++ b/ui/gfx/screen_mac.mm
@@ -85,7 +85,7 @@ bool Screen::IsDIPEnabled() {
 }
 
 // static
-gfx::Point Screen::GetCursorScreenPoint() {
+gfx::Point Screen::GetCursorScreenPoint(gfx::NativeView context) {
   NSPoint mouseLocation  = [NSEvent mouseLocation];
   // Flip coordinates to gfx (0,0 in top-left corner) using primary screen.
   NSScreen* screen = [[NSScreen screens] objectAtIndex:0];
@@ -97,19 +97,20 @@ gfx::Point Screen::GetCursorScreenPoint() {
 gfx::Display Screen::GetDisplayNearestWindow(gfx::NativeView view) {
   NSWindow* window = [view window];
   if (!window)
-    return GetPrimaryDisplay();
+    return GetPrimaryDisplay(view);
   NSScreen* match_screen = [window screen];
   return GetDisplayForScreen(match_screen, false /* may not be primary */);
 }
 
 // static
-gfx::Display Screen::GetDisplayMatching(const gfx::Rect& match_rect) {
+gfx::Display Screen::GetDisplayMatching(
+    gfx::NativeView context, const gfx::Rect& match_rect) {
   NSScreen* match_screen = GetMatchingScreen(match_rect);
   return GetDisplayForScreen(match_screen, false /* may not be primary */);
 }
 
 // static
-gfx::Display Screen::GetPrimaryDisplay() {
+gfx::Display Screen::GetPrimaryDisplay(gfx::NativeView context) {
   // Primary display is defined as the display with the menubar,
   // which is always at index 0.
   NSScreen* primary = [[NSScreen screens] objectAtIndex:0];
@@ -118,7 +119,7 @@ gfx::Display Screen::GetPrimaryDisplay() {
 }
 
 // static
-int Screen::GetNumDisplays() {
+int Screen::GetNumDisplays(gfx::NativeView context) {
   // Don't just return the number of online displays.  It includes displays
   // that mirror other displays, which are not desired in the count.  It's
   // tempting to use the count returned by CGGetActiveDisplayList, but active
@@ -153,7 +154,8 @@ int Screen::GetNumDisplays() {
 }
 
 // static
-gfx::Display Screen::GetDisplayNearestPoint(const gfx::Point& point) {
+gfx::Display Screen::GetDisplayNearestPoint(
+    gfx::NativeView context, const gfx::Point& point) {
   NSPoint ns_point = NSPointFromCGPoint(point.ToCGPoint());
 
   NSArray* screens = [NSScreen screens];