Refactor screen/monitor so that gfx::Screen returns monitor object.

ash/wm/window_resizer.cc

Index: ash/wm/window_resizer.cc
diff --git a/ash/wm/window_resizer.cc b/ash/wm/window_resizer.cc
index e48ee5270f9877817387cfc63731884d62d8b3fd..94d1891d48518cf54911cc4a92a68ac0209a5fea 100644
--- a/ash/wm/window_resizer.cc
+++ b/ash/wm/window_resizer.cc
@@ -203,8 +203,8 @@ gfx::Rect WindowResizer::CalculateBoundsForDrag(
   if (details.window_component == HTBOTTOM ||
       details.window_component == HTBOTTOMRIGHT ||
       details.window_component == HTBOTTOMLEFT) {
-    gfx::Rect work_area = gfx::Screen::GetMonitorWorkAreaNearestWindow(
-        details.window);
+    gfx::Rect work_area = gfx::Screen::GetMonitorNearestWindow(
+        details.window).work_area();
     if (new_bounds.bottom() > work_area.bottom())
       new_bounds.Inset(0, 0, 0,
                        new_bounds.bottom() - work_area.bottom());
@@ -295,7 +295,7 @@ int WindowResizer::GetWidthForDrag(const Details& details,
 
     // And don't let the window go bigger than the monitor.
     int max_width =
-        gfx::Screen::GetMonitorAreaNearestWindow(details.window).width();
+        gfx::Screen::GetMonitorNearestWindow(details.window).bounds().width();
     if (width > max_width) {
       width = max_width;
       *delta_x = -x_multiplier * (details.initial_bounds.width() - max_width);
@@ -329,7 +329,7 @@ int WindowResizer::GetHeightForDrag(const Details& details,
 
     // And don't let the window go bigger than the monitor.
     int max_height =
-        gfx::Screen::GetMonitorAreaNearestWindow(details.window).height();
+        gfx::Screen::GetMonitorNearestWindow(details.window).bounds().height();
     if (height > max_height) {
       height = max_height;
       *delta_y = -y_multiplier * (details.initial_bounds.height() - max_height);