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

ash/wm/workspace/workspace_manager.h

Index: ash/wm/workspace/workspace_manager.h
diff --git a/ash/wm/workspace/workspace_manager.h b/ash/wm/workspace/workspace_manager.h
index dde10aaff4395891572d912d1a37e8b034ae8ffc..21935fb938f72de5e25b13308732504739c518a2 100644
--- a/ash/wm/workspace/workspace_manager.h
+++ b/ash/wm/workspace/workspace_manager.h
@@ -31,7 +31,7 @@ class ShelfLayoutManager;
 class WorkspaceManagerTest;
 
 // WorkspaceManager manages multiple workspaces in the desktop.
-class ASH_EXPORT WorkspaceManager : public aura::WindowObserver{
+class ASH_EXPORT WorkspaceManager : public aura::WindowObserver {
  public:
   explicit WorkspaceManager(aura::Window* viewport);
   virtual ~WorkspaceManager();