Attempt 2: Allows tab dragging when maximized on aura. To fix it I made it so

chrome/browser/ui/views/tabs/tab_drag_controller2.h

Index: chrome/browser/ui/views/tabs/tab_drag_controller2.h
diff --git a/chrome/browser/ui/views/tabs/tab_drag_controller2.h b/chrome/browser/ui/views/tabs/tab_drag_controller2.h
index cbcbf05e6024b82b259356844a4d85973e3e0ef9..2d5ebec90f8526ef0956da125f4b7cb9c7ab1acc 100644
--- a/chrome/browser/ui/views/tabs/tab_drag_controller2.h
+++ b/chrome/browser/ui/views/tabs/tab_drag_controller2.h
@@ -279,6 +279,10 @@ class TabDragController2 : public TabDragController,
                                 const gfx::Point& screen_point,
                                 std::vector<gfx::Rect>* drag_bounds);
 
+  // Marks whether |window| is constrained. While dragging we set this to false
+  // to allow maximized windows to move any where.
+  void SetTrackedByWorkspace(gfx::NativeWindow window, bool value);
+
   // Handles registering for notifications.
   content::NotificationRegistrar registrar_;