Allow relative paths to external extension files for some providers, error out for others.

chrome/browser/extensions/extension_service.cc

Index: chrome/browser/extensions/extension_service.cc
diff --git a/chrome/browser/extensions/extension_service.cc b/chrome/browser/extensions/extension_service.cc
index 06290c7fec70c6fc23c8e5797a9c8c6182e69443..790071b96b012f0fcdf5b1831b8d9ff87ded60df 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -408,10 +408,10 @@ bool ExtensionService::UninstallExtensionHelper(
 }
 
 ExtensionService::ExtensionService(Profile* profile,
-                                     const CommandLine* command_line,
-                                     const FilePath& install_directory,
-                                     ExtensionPrefs* extension_prefs,
-                                     bool autoupdate_enabled)
+                                   const CommandLine* command_line,
+                                   const FilePath& install_directory,
+                                   ExtensionPrefs* extension_prefs,
+                                   bool autoupdate_enabled)
     : profile_(profile),
       extension_prefs_(extension_prefs),
       install_directory_(install_directory),