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

ash/wm/window_resizer.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/wm/window_resizer.h"
 
 #include "ash/screen_ash.h"
 #include "ash/shell.h"
 #include "ash/wm/property_util.h"
 #include "ash/wm/window_util.h"
@@ skipping 253 matching lines @@
     width += x_multiplier * (*delta_x);
 
     // Ensure we don't shrink past the minimum width and clamp delta_x
     // for the window origin computation.
     if (width < min_width) {
       width = min_width;
       *delta_x = -x_multiplier * (details.initial_bounds.width() - min_width);
     }
 
     // And don't let the window go bigger than the display.
-    int max_width =
-        gfx::Screen::GetDisplayNearestWindow(details.window).bounds().width();
+    int max_width = Shell::GetAshScreen()->GetDisplayNearestWindow(
+        details.window).bounds().width();
     if (width > max_width) {
       width = max_width;
       *delta_x = -x_multiplier * (details.initial_bounds.width() - max_width);
     }
   }
   return width;
 }
 
 // static
 int WindowResizer::GetHeightForDrag(const Details& details,
                                     int min_height,
                                     int* delta_y) {
   int height = details.initial_bounds.height();
   if (details.size_change_direction & kBoundsChangeDirection_Vertical) {
     // Along the bottom edge, positive delta_y increases the window size.
     int y_multiplier = IsBottomEdge(details.window_component) ? 1 : -1;
     height += y_multiplier * (*delta_y);
 
     // Ensure we don't shrink past the minimum height and clamp delta_y
     // for the window origin computation.
     if (height < min_height) {
       height = min_height;
       *delta_y = -y_multiplier * (details.initial_bounds.height() - min_height);
     }
 
     // And don't let the window go bigger than the display.
-    int max_height =
-        gfx::Screen::GetDisplayNearestWindow(details.window).bounds().height();
+    int max_height = Shell::GetAshScreen()->GetDisplayNearestWindow(
+        details.window).bounds().height();
     if (height > max_height) {
       height = max_height;
       *delta_y = -y_multiplier * (details.initial_bounds.height() - max_height);
     }
   }
   return height;
 }
 
 }  // namespace aura