Disallowing shelf changes via drag & drop if the enterprise profile does not allow changes

ash/launcher/launcher_view.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/launcher/launcher_view.h"
 
 #include <algorithm>
 
 #include "ash/ash_constants.h"
 #include "ash/ash_switches.h"
@@ skipping 1158 matching lines @@
       model_->Move(current_index, start_drag_index_);
       AnimateToIdealBounds();
     }
     drag_view_->layer()->SetOpacity(1.0f);
   }
   DestroyDragIconProxy();
 }
 
 LauncherView::RemovableState LauncherView::RemovableByRipOff(int index) {
   LauncherItemType type = model_->items()[index].type;
-  if (type == TYPE_APP_LIST)
+  if (type == TYPE_APP_LIST || !delegate_->CanPin())
     return NOT_REMOVABLE;
   std::string app_id =
       delegate_->GetAppIDForLauncherID(model_->items()[index].id);
   // Note: Only pinned app shortcuts can be removed!
   return (type == TYPE_APP_SHORTCUT && delegate_->IsAppPinned(app_id)) ?
       REMOVABLE : DRAGGABLE;
 }
 
 bool LauncherView::SameDragType(LauncherItemType typea,
                                 LauncherItemType typeb) const {
@@ skipping 691 matching lines @@
       break;
     case ash::SHELF_ALIGNMENT_TOP:
       distance = coordinate.y() - bounds.bottom();
       break;
   }
   return distance > 0 ? distance : 0;
 }
 
 }  // namespace internal
 }  // namespace ash