Move each permission classes to its own files in extensions/permissions

chrome/common/extensions/features/permission_feature.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/features/permission_feature.h"
 
-#include "chrome/common/extensions/extension_permission_set.h"
-
 namespace extensions {
 
 PermissionFeature::PermissionFeature() {
 }
 
 PermissionFeature::~PermissionFeature() {
 }
 
 Feature::Availability PermissionFeature::IsAvailableToContext(
     const Extension* extension,
     Feature::Context context,
     Feature::Platform platform) const {
   Availability availability = Feature::IsAvailableToContext(extension,
                                                             context,
                                                             platform);
   if (availability != IS_AVAILABLE)
     return availability;
 
   if (!extension->HasAPIPermission(name()))
     return NOT_PRESENT;
 
   return IS_AVAILABLE;
 }
 
 }  // namespace