Introduce a stable set of errors for inline install

chrome/common/extensions/chrome_extension_messages.h

 // Copyright 2014 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.
 
 // Chrome-specific IPC messages for extensions.
 // Extension-related messages that aren't specific to Chrome live in
 // extensions/common/extension_messages.h.
 //
 // Multiply-included message file, hence no include guard.
 
 #include "chrome/common/extensions/api/webstore/webstore_api_constants.h"
+#include "chrome/common/extensions/webstore_install_result.h"
 #include "chrome/common/web_application_info.h"
 #include "ipc/ipc_message_macros.h"
 
 #define IPC_MESSAGE_START ChromeExtensionMsgStart
 
 IPC_ENUM_TRAITS_MAX_VALUE(extensions::api::webstore::InstallStage,
                           extensions::api::webstore::INSTALL_STAGE_INSTALLING)
+IPC_ENUM_TRAITS_MAX_VALUE(extensions::webstore_install::Result,
+                          extensions::webstore_install::RESULT_LAST)
 
 IPC_STRUCT_TRAITS_BEGIN(WebApplicationInfo::IconInfo)
   IPC_STRUCT_TRAITS_MEMBER(url)
   IPC_STRUCT_TRAITS_MEMBER(width)
   IPC_STRUCT_TRAITS_MEMBER(height)
   IPC_STRUCT_TRAITS_MEMBER(data)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(WebApplicationInfo)
   IPC_STRUCT_TRAITS_MEMBER(title)
@@ skipping 21 matching lines @@
 IPC_MESSAGE_ROUTED1(ExtensionMsg_InlineInstallStageChanged,
                     extensions::api::webstore::InstallStage /* stage */)
 
 // Sent to the renderer if download progress updates were requested for an
 // inline install.
 IPC_MESSAGE_ROUTED1(ExtensionMsg_InlineInstallDownloadProgress,
                     int /* percent_downloaded */)
 
 // Send to renderer once the installation mentioned on
 // ExtensionHostMsg_InlineWebstoreInstall is complete.
-IPC_MESSAGE_ROUTED3(ExtensionMsg_InlineWebstoreInstallResponse,
+IPC_MESSAGE_ROUTED4(ExtensionMsg_InlineWebstoreInstallResponse,
                     int32 /* install id */,
                     bool /* whether the install was successful */,
-                    std::string /* error */)
+                    std::string /* error */,
+                    extensions::webstore_install::Result /* result */)
 
 // Messages sent from the renderer to the browser.
 
 IPC_MESSAGE_ROUTED1(ChromeExtensionHostMsg_DidGetApplicationInfo,
                     WebApplicationInfo)