Fix DCHECK error when using multi window resizer on the 2nd display that is place on the left side.

The cause of the error was work_area in screen coordinates was passed to CalculateAttachedSizes while bounds is in |window()->parent()|'s coordinates.

BUG=139231
TEST=Set the 2nd display on left, open two windows and use multi window resizer on debug build, and check crash does not occur.

Review URL: https://chromiumcodereview.appspot.com/10836157

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@150911 0039d316-1c4b-4281-b951-d872f2087c98

ash/wm/workspace/workspace_window_resizer.cc

@@ -286,8 +286,7 @@ gfx::Rect WorkspaceWindowResizer::GetFinalBounds(
 void WorkspaceWindowResizer::LayoutAttachedWindows(
     const gfx::Rect& bounds,
     int grid_size) {
-  gfx::Rect work_area(
-      gfx::Screen::GetDisplayNearestWindow(window()).work_area());
+  gfx::Rect work_area(ScreenAsh::GetDisplayWorkAreaBoundsInParent(window()));
   std::vector<int> sizes;
   CalculateAttachedSizes(
       PrimaryAxisSize(details_.initial_bounds.size()),