[Extensions] Clean up renderer channel-related code

extensions/renderer/dispatcher.h

 // 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_RENDERER_DISPATCHER_H_
 #define EXTENSIONS_RENDERER_DISPATCHER_H_
 
 #include <stdint.h>
 
 #include <map>
 #include <memory>
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/scoped_observer.h"
 #include "base/timer/timer.h"
+#include "components/version_info/version_info.h"
 #include "content/public/renderer/render_thread_observer.h"
 #include "extensions/common/event_filter.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/extensions_client.h"
 #include "extensions/common/features/feature.h"
 #include "extensions/renderer/resource_bundle_source_map.h"
 #include "extensions/renderer/script_context.h"
 #include "extensions/renderer/script_context_set.h"
 #include "extensions/renderer/user_script_set_manager.h"
 #include "extensions/renderer/v8_schema_registry.h"
@@ skipping 141 matching lines @@
                            const ExtensionMsg_ExternalConnectionInfo& info,
                            const std::string& tls_channel_id);
   void OnDispatchOnDisconnect(int port_id, const std::string& error_message);
   void OnLoaded(
       const std::vector<ExtensionMsg_Loaded_Params>& loaded_extensions);
   void OnMessageInvoke(const std::string& extension_id,
                        const std::string& module_name,
                        const std::string& function_name,
                        const base::ListValue& args,
                        bool user_gesture);
-  void OnSetChannel(int channel);
+  void OnSetChannel(version_info::Channel channel);
   void OnSetScriptingWhitelist(
       const ExtensionsClient::ScriptingWhitelist& extension_ids);
   void OnSetSystemFont(const std::string& font_family,
                        const std::string& font_size);
   void OnSetWebViewPartitionID(const std::string& partition_id);
   void OnShouldSuspend(const std::string& extension_id, uint64_t sequence_id);
   void OnSuspend(const std::string& extension_id);
   void OnTransferBlobs(const std::vector<std::string>& blob_uuids);
   void OnUnloaded(const std::string& id);
   void OnUpdatePermissions(const ExtensionMsg_UpdatePermissions_Params& params);
@@ skipping 125 matching lines @@
   // if this renderer is a WebView guest render process. Otherwise, this will be
   // empty.
   std::string webview_partition_id_;
 
   DISALLOW_COPY_AND_ASSIGN(Dispatcher);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_DISPATCHER_H_