Change EventGenerator to take a RootWindow at construction instead of just assuming one via RootWin…

ash/drag_drop/drag_drop_controller_unittest.cc

Index: ash/drag_drop/drag_drop_controller_unittest.cc
===================================================================
--- ash/drag_drop/drag_drop_controller_unittest.cc	(revision 122697)
+++ ash/drag_drop/drag_drop_controller_unittest.cc	(working copy)
@@ -216,7 +216,8 @@
   AddViewToWidgetAndResize(widget.get(), drag_view);
   ui::OSExchangeData data;
   data.SetString(UTF8ToUTF16("I am being dragged"));
-  aura::test::EventGenerator generator(widget->GetNativeView());
+  aura::test::EventGenerator generator(Shell::GetRootWindow(),
+                                       widget->GetNativeView());
   generator.PressLeftButton();
 
   int num_drags = 17;
@@ -257,7 +258,7 @@
   ui::OSExchangeData data;
   data.SetString(UTF8ToUTF16("I am being dragged"));
 
-  aura::test::EventGenerator generator;
+  aura::test::EventGenerator generator(Shell::GetRootWindow());
   generator.MoveMouseRelativeTo(widget->GetNativeView(),
                                 drag_view1->bounds().CenterPoint());
   generator.PressLeftButton();
@@ -314,7 +315,8 @@
   ui::OSExchangeData data;
   data.SetString(UTF8ToUTF16("I am being dragged"));
 
-  aura::test::EventGenerator generator(widget1->GetNativeView());
+  aura::test::EventGenerator generator(Shell::GetRootWindow(),
+                                       widget1->GetNativeView());
   generator.PressLeftButton();
 
   int num_drags = drag_view1->width();
@@ -362,7 +364,7 @@
   ui::OSExchangeData data;
   data.SetString(UTF8ToUTF16("I am being dragged"));
 
-  aura::test::EventGenerator generator;
+  aura::test::EventGenerator generator(Shell::GetRootWindow());
   generator.MoveMouseToCenterOf(widget->GetNativeView());
   generator.PressLeftButton();
 
@@ -419,7 +421,8 @@
   DragTestView* drag_view = new DragTestView;
   AddViewToWidgetAndResize(widget.get(), drag_view);
 
-  aura::test::EventGenerator generator(widget->GetNativeView());
+  aura::test::EventGenerator generator(Shell::GetRootWindow(),
+                                       widget->GetNativeView());
   ui::OSExchangeData data;
   std::string data_str("I am being dragged");
   data.SetString(ASCIIToUTF16(data_str));
@@ -441,7 +444,8 @@
 
   ui::OSExchangeData data;
   data.SetString(UTF8ToUTF16("I am being dragged"));
-  aura::test::EventGenerator generator(widget->GetNativeView());
+  aura::test::EventGenerator generator(Shell::GetRootWindow(),
+                                       widget->GetNativeView());
   generator.PressLeftButton();
 
   int num_drags = 17;
@@ -480,7 +484,8 @@
   AddViewToWidgetAndResize(widget.get(), drag_view);
   ui::OSExchangeData data;
   data.SetString(UTF8ToUTF16("I am being dragged"));
-  aura::test::EventGenerator generator(widget->GetNativeView());
+  aura::test::EventGenerator generator(Shell::GetRootWindow(),
+                                       widget->GetNativeView());
   generator.PressLeftButton();
 
   int num_drags = 17;