[Extensions] Move Feature channel code into //extensions

extensions/common/features/simple_feature_filter.h

Index: extensions/common/features/simple_feature_filter.h
diff --git a/extensions/common/features/simple_feature_filter.h b/extensions/common/features/simple_feature_filter.h
deleted file mode 100644
index 4f8a8c2e7bd26b5ae30c906eea4062205397d970..0000000000000000000000000000000000000000
--- a/extensions/common/features/simple_feature_filter.h
+++ /dev/null
@@ -1,64 +0,0 @@
-// 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.
-
-#ifndef EXTENSIONS_COMMON_FEATURES_SIMPLE_FEATURE_FILTER_H_
-#define EXTENSIONS_COMMON_FEATURES_SIMPLE_FEATURE_FILTER_H_
-
-#include <string>
-
-#include "base/macros.h"
-#include "extensions/common/features/feature.h"
-#include "extensions/common/manifest.h"
-
-class GURL;
-
-namespace base {
-class DictionaryValue;
-}
-
-namespace extensions {
-
-class SimpleFeature;
-
-// A SimpleFeatureFilter can be attached to SimpleFeature objects to provide
-// additional parsing and availability filtering behavior.
-class SimpleFeatureFilter {
- public:
-  explicit SimpleFeatureFilter(SimpleFeature* feature);
-  virtual ~SimpleFeatureFilter();
-
-  SimpleFeature* feature() const { return feature_; }
-
-  // Parses any additional feature data that may be used by this filter.
-  // Returns an error string on failure or the empty string on success.
-  // The default implementation simply returns the empty string.
-  virtual std::string Parse(const base::DictionaryValue* value);
-
-  // Indicates whether or not the owning feature is available within a given
-  // extensions context. The default implementation only affirms availability.
-  virtual Feature::Availability IsAvailableToContext(
-      const Extension* extension,
-      Feature::Context context,
-      const GURL& url,
-      Feature::Platform platform) const;
-
-  // Indicates whether or not the owning feature is available to a given
-  // extension manifest. The default implementation only affirms availability.
-  virtual Feature::Availability IsAvailableToManifest(
-      const std::string& extension_id,
-      Manifest::Type type,
-      Manifest::Location location,
-      int manifest_version,
-      Feature::Platform platform) const;
-
- private:
-  // The feature which owns this filter.
-  SimpleFeature* feature_;
-
-  DISALLOW_COPY_AND_ASSIGN(SimpleFeatureFilter);
-};
-
-}  // namespace extensions
-
-#endif  // EXTENSIONS_COMMON_FEATURES_SIMPLE_FEATURE_FILTER_H_