Don't try to reload blacklisted extensions.

chrome/browser/extensions/extension_service.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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_
 
 #include <list>
 #include <map>
 #include <set>
@@ skipping 175 matching lines @@
   // TODO(aa): This method can be removed. ExtensionUpdater could use
   // CrxInstaller directly instead.
   virtual bool UpdateExtension(
       const std::string& id,
       const base::FilePath& extension_path,
       bool file_ownership_passed,
       extensions::CrxInstaller** out_crx_installer) OVERRIDE;
 
   // Reloads the specified extension, sending the onLaunched() event to it if it
   // currently has any window showing.
-  void ReloadExtension(const std::string extension_id);
+  void ReloadExtension(const std::string& extension_id);
 
   // Uninstalls the specified extension. Callers should only call this method
   // with extensions that exist. |external_uninstall| is a magical parameter
   // that is only used to send information to ExtensionPrefs, which external
   // callers should never set to true.
   //
-  // We pass the |extension_id| by value to avoid having it deleted from under
-  // us incase someone calls it with Extension::id() or another string that we
-  // are going to delete in this function.
-  //
   // TODO(aa): Remove |external_uninstall| -- this information should be passed
   // to ExtensionPrefs some other way.
   virtual bool UninstallExtension(const std::string& extension_id,
                                   bool external_uninstall,
                                   base::string16* error);
 
   virtual bool IsExtensionEnabled(
       const std::string& extension_id) const OVERRIDE;
 
   // Enables the extension.  If the extension is already enabled, does
@@ skipping 477 matching lines @@
                            InstallAppsWithUnlimtedStorage);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            InstallAppsAndCheckStorageProtection);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest, SetUnsetBlacklistInPrefs);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            BlacklistedExtensionWillNotInstall);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            UnloadBlacklistedExtensionPolicy);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            WillNotLoadBlacklistedExtensionsFromDirectory);
-  FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
-                           BlacklistedInPrefsFromStartup);
+  FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest, ReloadBlacklistedExtension);
+  FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest, BlacklistedInPrefsFromStartup);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            GreylistedExtensionDisabled);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            GreylistDontEnableManuallyDisabled);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            GreylistUnknownDontChange);
   DISALLOW_COPY_AND_ASSIGN(ExtensionService);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_