Pass on download or installation errors from WebstoreInstaller to the CompleteInstall function.

chrome/browser/extensions/api/webstore_private/webstore_private_api.cc

 // Copyright (c) 2012 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 "chrome/browser/extensions/api/webstore_private/webstore_private_api.h"
 
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/memory/scoped_vector.h"
@@ skipping 420 matching lines @@
   }
 
   scoped_ptr<WebstoreInstaller::Approval> approval(
       g_pending_approvals.Get().PopApproval(profile(), id));
   if (!approval.get()) {
     error_ = ExtensionErrorUtils::FormatErrorMessage(
         kNoPreviousBeginInstallWithManifestError, id);
     return false;
   }
 
+  AddRef();
+
   // The extension will install through the normal extension install flow, but
   // the whitelist entry will bypass the normal permissions install dialog.
   scoped_refptr<WebstoreInstaller> installer = new WebstoreInstaller(
-      profile(), test_webstore_installer_delegate,
+      profile(), this,
       &(dispatcher()->delegate()->GetAssociatedWebContents()->GetController()),
       id, approval.Pass(), WebstoreInstaller::FLAG_NONE);
   installer->Start();
 
   return true;
 }
 
+void CompleteInstallFunction::OnExtensionInstallSuccess(
+    const std::string& id) {
+  if (test_webstore_installer_delegate)
+    test_webstore_installer_delegate->OnExtensionInstallSuccess(id);
+
+  SendResponse(true);
+
+  // Matches the AddRef in RunImpl().
+  Release();
+}
+
+void CompleteInstallFunction::OnExtensionInstallFailure(
+    const std::string& id, const std::string& error) {
+  if (test_webstore_installer_delegate)
+    test_webstore_installer_delegate->OnExtensionInstallFailure(id, error);
+
+  error_ = error;
+  SendResponse(false);
+
+  // Matches the AddRef in RunImpl().
+  Release();
+}
+
+
 bool GetBrowserLoginFunction::RunImpl() {
   SetResult(CreateLoginResult(profile_->GetOriginalProfile()));
   return true;
 }
 
 bool GetStoreLoginFunction::RunImpl() {
   ExtensionService* service = profile_->GetExtensionService();
   ExtensionPrefs* prefs = service->extension_prefs();
   std::string login;
   if (prefs->GetWebStoreLogin(&login)) {
@@ skipping 31 matching lines @@
   feature_checker_->CheckGPUFeatureAvailability();
   return true;
 }
 
 void GetWebGLStatusFunction::OnFeatureCheck(bool feature_allowed) {
   CreateResult(feature_allowed);
   SendResponse(true);
 }
 
 }  // namespace extensions