Allow extension overinstall

chrome/test/automation/automation_messages.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.
 
 #ifndef CHROME_TEST_AUTOMATION_AUTOMATION_MESSAGES_H__
 #define CHROME_TEST_AUTOMATION_AUTOMATION_MESSAGES_H__
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 96 matching lines @@
   }
   static void Log(const param_type& p, std::wstring* l) {
     std::wstring control;
     switch (p) {
      case AUTOMATION_MSG_EXTENSION_INSTALL_SUCCEEDED:
       control = L"AUTOMATION_MSG_EXTENSION_INSTALL_SUCCEEDED";
       break;
      case AUTOMATION_MSG_EXTENSION_INSTALL_FAILED:
       control = L"AUTOMATION_MSG_EXTENSION_INSTALL_FAILED";
       break;
-     case AUTOMATION_MSG_EXTENSION_ALREADY_INSTALLED:
-      control = L"AUTOMATION_MSG_EXTENSION_ALREADY_INSTALLED";
-      break;
      default:
       control = L"UNKNOWN";
       break;
     }
 
     LogParam(control, l);
   }
 };
 
 template <>
@@ skipping 483 matching lines @@
   }
 };
 
 }  // namespace IPC
 
 #define MESSAGES_INTERNAL_FILE \
     "chrome/test/automation/automation_messages_internal.h"
 #include "ipc/ipc_message_macros.h"
 
 #endif  // CHROME_TEST_AUTOMATION_AUTOMATION_MESSAGES_H__