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

extensions/common/manifest.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/manifest.h"
 
 #include "base/basictypes.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/strings/string_split.h"
@@ skipping 128 matching lines @@
     std::string* error,
     std::vector<InstallWarning>* warnings) const {
   *error = "";
 
   // Check every feature to see if its in the manifest. Note that this means
   // we will ignore keys that are not features; we do this for forward
   // compatibility.
   // TODO(aa): Consider having an error here in the case of strict error
   // checking to let developers know when they screw up.
 
-  FeatureProvider* manifest_feature_provider =
+  const FeatureProvider* manifest_feature_provider =
       FeatureProvider::GetManifestFeatures();
   const std::vector<std::string>& feature_names =
       manifest_feature_provider->GetAllFeatureNames();
   for (std::vector<std::string>::const_iterator feature_name =
            feature_names.begin();
        feature_name != feature_names.end(); ++feature_name) {
     // Use Get instead of HasKey because the former uses path expansion.
     if (!value_->Get(*feature_name, NULL))
       continue;
 
@@ skipping 97 matching lines @@
   Feature* feature = FeatureProvider::GetManifestFeatures()->GetFeature(key);
   if (!feature)
     return true;
 
   return feature->IsAvailableToManifest(
                       extension_id_, type_, location_, GetManifestVersion())
       .is_available();
 }
 
 }  // namespace extensions