Introduce a stable set of errors for inline install

chrome/browser/ui/app_list/search/webstore/webstore_result.h

Index: chrome/browser/ui/app_list/search/webstore/webstore_result.h
diff --git a/chrome/browser/ui/app_list/search/webstore/webstore_result.h b/chrome/browser/ui/app_list/search/webstore/webstore_result.h
index f507c9837e8cfa9c1f9e76c62f55aa701a21abaf..bc5f53af3d9e5208ba0e16f45cbd6b3e07ca0582 100644
--- a/chrome/browser/ui/app_list/search/webstore/webstore_result.h
+++ b/chrome/browser/ui/app_list/search/webstore/webstore_result.h
@@ -10,8 +10,8 @@
 #include "base/basictypes.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/extensions/install_observer.h"
-#include "chrome/browser/extensions/webstore_install_result.h"
 #include "chrome/browser/ui/app_list/search/chrome_search_result.h"
+#include "chrome/common/extensions/webstore_install_result.h"
 #include "extensions/browser/extension_registry_observer.h"
 #include "url/gurl.h"
 
@@ -52,7 +52,9 @@ class WebstoreResult : public ChromeSearchResult,
   void OnIconLoaded();
 
   void StartInstall(bool launch_ephemeral_app);
-  void InstallCallback(bool success, const std::string& error);
+  void InstallCallback(bool success,
+                       const std::string& error,
+                       extensions::webstore_install::Result result);
   void LaunchCallback(extensions::webstore_install::Result result,
                       const std::string& error);