[Extensions] Clean up renderer channel-related code

extensions/common/features/simple_feature_unittest.cc

 // Copyright 2014 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/simple_feature.h"
 
 #include <stddef.h>
 
 #include <string>
 
@@ skipping 18 matching lines @@
   std::string extension_id;
   Manifest::Type extension_type;
   Manifest::Location location;
   Feature::Platform platform;
   int manifest_version;
   Feature::AvailabilityResult expected_result;
 };
 
 template <class FeatureClass>
 SimpleFeature* CreateFeature() {
-  SimpleFeature* feature = new FeatureClass();
-  feature->set_check_channel(true);
-  return feature;
+  return new FeatureClass();
 }
 
 Feature::AvailabilityResult IsAvailableInChannel(
     const std::string& channel,
     version_info::Channel channel_for_testing) {
   ScopedCurrentChannel current_channel(channel_for_testing);
 
   SimpleFeature feature;
 
   base::DictionaryValue feature_value;
   feature_value.SetString("channel", channel);
-  feature.set_check_channel(true);
   feature.Parse(&feature_value);
 
   return feature
       .IsAvailableToManifest("random-extension", Manifest::TYPE_UNKNOWN,
                              Manifest::INVALID_LOCATION, -1,
                              Feature::GetCurrentPlatform())
       .result();
 }
 
 }  // namespace
@@ skipping 943 matching lines @@
         Feature::IS_AVAILABLE,
         feature->IsAvailableToManifest("1",
                                        Manifest::TYPE_EXTENSION,
                                        Manifest::INVALID_LOCATION,
                                        Feature::UNSPECIFIED_PLATFORM,
                                        Feature::GetCurrentPlatform()).result());
   }
 }
 
 }  // namespace extensions