Indicate in the tab UI if appcache creation was blocked by privacy settings.

chrome/common/render_messages_internal.h

 // Copyright (c) 2010 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.
 
 // This header is meant to be included in multiple passes, hence no traditional
 // header guard.
 // See ipc_message_macros.h for explanation of the macros and passes.
 
 #include <map>
 #include <string>
@@ skipping 607 matching lines @@
   // Notifies the renderer of an AppCache status change.
   IPC_MESSAGE_CONTROL2(AppCacheMsg_StatusChanged,
                        std::vector<int> /* host_ids */,
                        appcache::Status)
 
   // Notifies the renderer of an AppCache event.
   IPC_MESSAGE_CONTROL2(AppCacheMsg_EventRaised,
                        std::vector<int> /* host_ids */,
                        appcache::EventID)
 
+  // Notifies the renderer of the fact that AppCache access was blocked.
+  IPC_MESSAGE_CONTROL1(AppCacheMsg_ContentBlocked,
+                       int /* host_id */)
+
   // Reply to the ViewHostMsg_QueryFormFieldAutofill message with the
   // autofill suggestions.
   IPC_MESSAGE_ROUTED4(ViewMsg_AutoFillSuggestionsReturned,
                       int /* id of the request message */,
                       std::vector<string16> /* names */,
                       std::vector<string16> /* labels */,
                       int /* index of default suggestion */)
 
   // Reply to the ViewHostMsg_QueryFormFieldAutofill message with the
   // autocomplete suggestions.
@@ skipping 1644 matching lines @@
                        int /* render_view_id */,
                        int /* bridge_id */)
 
   // The |render_view_id| and |bridge_id| requests Geolocation service to
   // resume.
   IPC_MESSAGE_CONTROL2(ViewHostMsg_Geolocation_Resume,
                        int /* render_view_id */,
                        int /* bridge_id */)
 
 IPC_END_MESSAGES(ViewHost)