Prevent unnecessary prompts when unpacked extensions use chrome.permissions.request.

chrome/common/extensions/extension.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/common/extensions/extension.h"
 
 #include <algorithm>
 
 #include "base/base64.h"
 #include "base/basictypes.h"
@@ skipping 2642 matching lines @@
       // TODO(skerner): Consider showing the reason |permission_str| is not
       // a valid URL pattern if it is almost valid.  For example, if it has
       // a valid scheme, and failed to parse because it has a port, show an
       // error.
     }
   }
   return true;
 }
 
 bool Extension::CanSilentlyIncreasePermissions() const {
-  return location() != INTERNAL;
+  return location() != INTERNAL && location() != LOAD;
 }
 
 bool Extension::CanSpecifyHostPermission(const URLPattern& pattern,
     const ExtensionAPIPermissionSet& permissions) const {
   if (!pattern.match_all_urls() &&
       pattern.MatchesScheme(chrome::kChromeUIScheme)) {
     // Regular extensions are only allowed access to chrome://favicon.
     if (pattern.host() == chrome::kChromeUIFaviconHost)
       return true;
 
@@ skipping 368 matching lines @@
     already_disabled(false),
     extension(extension) {}
 
 UpdatedExtensionPermissionsInfo::UpdatedExtensionPermissionsInfo(
     const Extension* extension,
     const ExtensionPermissionSet* permissions,
     Reason reason)
     : reason(reason),
       extension(extension),
       permissions(permissions) {}