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

This makes TestFeaturesNativeHandler less Chrome-specific.
Also add more const to FeatureProvider.

Remove common_resources.h from extensions DEPS.

BUG=368334
[email protected]

Review URL: https://codereview.chromium.org/293943002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@272097 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/extensions/renderer/api_definitions_natives.cc b/extensions/renderer/api_definitions_natives.cc
index c0dc699..61ea7109 100644
--- a/extensions/renderer/api_definitions_natives.cc
+++ b/extensions/renderer/api_definitions_natives.cc
@@ -23,7 +23,7 @@
 void ApiDefinitionsNatives::GetExtensionAPIDefinitionsForTest(
     const v8::FunctionCallbackInfo<v8::Value>& args) {
   std::vector<std::string> apis;
-  FeatureProvider* feature_provider = FeatureProvider::GetAPIFeatures();
+  const FeatureProvider* feature_provider = FeatureProvider::GetAPIFeatures();
   const std::vector<std::string>& feature_names =
       feature_provider->GetAllFeatureNames();
   for (std::vector<std::string>::const_iterator i = feature_names.begin();