Create CrxInstaller directly in WebstoreInstaller

chrome/browser/download/download_crx_util.h

 // 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.
 //
 // Download code which handles CRX files (extensions, themes, apps, ...).
 
 #ifndef CHROME_BROWSER_DOWNLOAD_DOWNLOAD_CRX_UTIL_H_
 #define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_CRX_UTIL_H_
 
 
@@ skipping 12 matching lines @@
 class CrxInstaller;
 }
 
 namespace download_crx_util {
 
 // Allow tests to install a mock ExtensionInstallPrompt object, to fake
 // user clicks on the permissions dialog.
 void SetMockInstallPromptForTesting(
     scoped_ptr<ExtensionInstallPrompt> mock_prompt);
 
+// Create a CrxInstaller for a given |download_item|.
+scoped_refptr<extensions::CrxInstaller> CreateCrxInstaller(
+    Profile* profile,
+    const content::DownloadItem& download_item);
+
 // Start installing a downloaded item item as a CRX (extension, theme, app,
 // ...).  The installer does work on the file thread, so the installation
 // is not complete when this function returns.  Returns the object managing
 // the installation.
 scoped_refptr<extensions::CrxInstaller> OpenChromeExtension(
     Profile* profile,
     const content::DownloadItem& download_item);
 
 // Returns true if this is an extension download. This also considers user
 // scripts to be extension downloads, since we convert those automatically.
 bool IsExtensionDownload(const content::DownloadItem& download_item);
 
 // Checks whether an extension download should be allowed to proceed because the
 // installation site is whitelisted in prefs.
 bool OffStoreInstallAllowedByPrefs(Profile* profile,
                                    const content::DownloadItem& item);
 
 }  // namespace download_crx_util
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_CRX_UTIL_H_