Disables pinned tabs until I land apps. I've #ifdef parts that are...

chrome/browser/sessions/session_service.cc

 // Copyright (c) 2006-2008 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 "build/build_config.h"
 
 #include "chrome/browser/sessions/session_service.h"
 
 #include <limits>
 
@@ skipping 892 matching lines @@
         GetWindow(payload.id, windows)->type =
             BrowserTypeForWindowType(
                 static_cast<WindowType>(payload.index));
         break;
       }
 
       case kCommandSetPinnedState: {
         PinnedStatePayload payload;
         if (!command->GetPayload(&payload, sizeof(payload)))
           return true;
+#if defined(ENABLE_PINNED_TABS)
         GetTab(payload.tab_id, tabs)->pinned = payload.pinned_state;
+#endif
         break;
       }
 
       default:
         return true;
     }
   }
   return true;
 }
 
@@ skipping 272 matching lines @@
       return Browser::TYPE_APP;
     case TYPE_APP_POPUP:
       return Browser::TYPE_APP_POPUP;
     case TYPE_DEVTOOLS:
       return Browser::TYPE_DEVTOOLS;
     case TYPE_NORMAL:
     default:
       return Browser::TYPE_NORMAL;
   }
 }