Clean up TestFeaturesNativeHandler to use the ExtensionsClient's JSON feature sources.

extensions/common/features/feature_provider.cc

 // Copyright 2013 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 "extensions/common/features/feature_provider.h"
 
 #include <map>
 
 #include "base/basictypes.h"
 #include "base/lazy_instance.h"
@@ skipping 29 matching lines @@
       FeatureProviderMap;
 
   FeatureProviderMap feature_providers_;
 };
 
 base::LazyInstance<Static> g_static = LAZY_INSTANCE_INITIALIZER;
 
 }  // namespace
 
 // static
-FeatureProvider* FeatureProvider::GetByName(const std::string& name) {
+const FeatureProvider* FeatureProvider::GetByName(const std::string& name) {
   return g_static.Get().GetFeatures(name);
 }
 
 // static
-FeatureProvider* FeatureProvider::GetAPIFeatures() {
+const FeatureProvider* FeatureProvider::GetAPIFeatures() {
   return GetByName("api");
 }
 
 // static
-FeatureProvider* FeatureProvider::GetManifestFeatures() {
+const FeatureProvider* FeatureProvider::GetManifestFeatures() {
   return GetByName("manifest");
 }
 
 // static
-FeatureProvider* FeatureProvider::GetPermissionFeatures() {
+const FeatureProvider* FeatureProvider::GetPermissionFeatures() {
   return GetByName("permission");
 }
 
 }  // namespace extensions