[Extensions] Move Feature channel code into //extensions

chrome/common/extensions/features/chrome_channel_feature_filter.h

Index: chrome/common/extensions/features/chrome_channel_feature_filter.h
diff --git a/chrome/common/extensions/features/chrome_channel_feature_filter.h b/chrome/common/extensions/features/chrome_channel_feature_filter.h
deleted file mode 100644
index bf1c05dc17d0e0a2e455faaa67a3dad250fdf415..0000000000000000000000000000000000000000
--- a/chrome/common/extensions/features/chrome_channel_feature_filter.h
+++ /dev/null
@@ -1,39 +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 CHROME_COMMON_EXTENSIONS_FEATURES_CHROME_CHANNEL_FEATURE_FILTER_H_
-#define CHROME_COMMON_EXTENSIONS_FEATURES_CHROME_CHANNEL_FEATURE_FILTER_H_
-
-#include "extensions/common/features/simple_feature_filter.h"
-
-namespace version_info {
-enum class Channel;
-}
-
-namespace extensions {
-
-// This filter parses a "channel" key from feature value data and makes features
-// unavailable if they aren't stable enough for the current channel.
-class ChromeChannelFeatureFilter : public SimpleFeatureFilter {
- public:
-  explicit ChromeChannelFeatureFilter(SimpleFeature* feature);
-  ~ChromeChannelFeatureFilter() override;
-
-  // SimpleFeatureFilter implementation.
-  std::string Parse(const base::DictionaryValue* value) override;
-  Feature::Availability IsAvailableToManifest(
-      const std::string& extension_id,
-      Manifest::Type type,
-      Manifest::Location location,
-      int manifest_version,
-      Feature::Platform platform) const override;
-
- private:
-  bool channel_has_been_set_;
-  version_info::Channel channel_;
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_COMMON_EXTENSIONS_FEATURES_CHROME_CHANNEL_FEATURE_FILTER_H_