Support Drag and Drop across displays.

ash/drag_drop/drag_drop_controller_unittest.cc

Index: ash/drag_drop/drag_drop_controller_unittest.cc
diff --git a/ash/drag_drop/drag_drop_controller_unittest.cc b/ash/drag_drop/drag_drop_controller_unittest.cc
index ca6e368ef98e76a9bb27f397b0ad4303658871bf..7740186e127763ba315ad3ad0e40588893d998fa 100644
--- a/ash/drag_drop/drag_drop_controller_unittest.cc
+++ b/ash/drag_drop/drag_drop_controller_unittest.cc
@@ -127,11 +127,13 @@ class TestDragDropController : public internal::DragDropController {
 
  private:
   int StartDragAndDrop(const ui::OSExchangeData& data,
+                       aura::RootWindow* root_window,
                        const gfx::Point& location,
                        int operation) OVERRIDE {
     drag_start_received_ = true;
     data.GetString(&drag_string_);
-    return DragDropController::StartDragAndDrop(data, location, operation);
+    return DragDropController::StartDragAndDrop(
+        data, root_window, location, operation);
   }
 
   void DragUpdate(aura::Window* target,