Fix some issues with extensions:

chrome/browser/extensions/extensions_service.cc

 // Copyright (c) 2010 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/extensions_service.h"
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/histogram.h"
@@ skipping 957 matching lines @@
         extension_prefs_->GetExtensionState(extension->id());
     initial_state =
         (existing_state == Extension::DISABLED) ?
         Extension::DISABLED : Extension::ENABLED;
     initial_enable_incognito = false;
   }
 
   extension_prefs_->OnExtensionInstalled(
       extension, initial_state, initial_enable_incognito);
 
+  // Unpacked extensions start off with file access since they are a developer
+  // feature.
+  if (extension->location() == Extension::LOAD)
+    extension_prefs_->SetAllowFileAccess(extension->id(), true);
+
   // If the extension is a theme, tell the profile (and therefore ThemeProvider)
   // to apply it.
   if (extension->is_theme()) {
     NotificationService::current()->Notify(
         NotificationType::THEME_INSTALLED,
         Source<Profile>(profile_),
         Details<Extension>(extension));
   } else {
     NotificationService::current()->Notify(
         NotificationType::EXTENSION_INSTALLED,
@@ skipping 332 matching lines @@
   // Finish installing on UI thread.
   ChromeThread::PostTask(
       ChromeThread::UI, FROM_HERE,
       NewRunnableMethod(
           frontend_,
           &ExtensionsService::ContinueLoadAllExtensions,
           extensions_to_reload,
           start_time,
           true));
 }