Expand and split DisplayController mojom.

services/ui/public/interfaces/display/display_controller.mojom

Index: services/ui/public/interfaces/display/display_controller.mojom
diff --git a/services/ui/public/interfaces/display/display_controller.mojom b/services/ui/public/interfaces/display/display_controller.mojom
index b9ae186dca3708d4c6225153a71e8f28155f42a4..c4e126d824ea64e82ef841089fe7ccfc44e2d51d 100644
--- a/services/ui/public/interfaces/display/display_controller.mojom
+++ b/services/ui/public/interfaces/display/display_controller.mojom
@@ -4,13 +4,20 @@
 
 module display.mojom;
 
+import "ui/gfx/geometry/mojo/geometry.mojom";
+
 // An interface for clients that are allowed to make changes to the display 
 // state.
 interface DisplayController {
-  // Toggles adding or removing a virtual display. If there is only one display
-  // a second display is added. If there is more than one display then the last
-  // display is removed. 
-  ToggleVirtualDisplay();
+
+  // Swap the primary display and the next display.
+  SwapPrimaryDisplay();
+
+  // Sets the display work area with the provided insets. The display size is
+  // included to ensure that the insets are for the current display size.
+  SetDisplayWorkArea(int64 display_id, 
+                     gfx.mojom.Size size,
+                     gfx.mojom.Insets insets);
 
   // TODO(kylechar): This interface will need to be expanded to provide
   // additional functionality for the display settings page and other ash