Set the Feature's ChannelForTesting to Trunk during ActiveTabTest.

chrome/common/extensions/features/feature.h

 // Copyright (c) 2012 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_FEATURE_H_
 #define CHROME_COMMON_EXTENSIONS_FEATURES_FEATURE_H_
 
 #include <set>
 #include <string>
 
@@ skipping 63 matching lines @@
   // See http://crbug.com/126535.
   static void SetChannelCheckingEnabled(bool enabled);
   static void ResetChannelCheckingEnabled();
 
   // (Re)Sets the Channel to for all Features to compare against. This is
   // usually chrome::VersionInfo::GetChannel(), but for tests allow this to be
   // overridden.
   static void SetChannelForTesting(chrome::VersionInfo::Channel channel);
   static void ResetChannelForTesting();
 
+  // Returns the current channel as seen by the Feature system (i.e. the
+  // ChannelForTesting if one is set, otherwise the actual channel).
+  static chrome::VersionInfo::Channel GetCurrentChannel();
+
   const std::string& name() const { return name_; }
   void set_name(const std::string& name) { name_ = name; }
 
   // Gets the platform the code is currently running on.
   static Platform GetCurrentPlatform();
 
   // Gets the Feature::Location value for the specified Extension::Location.
   static Location ConvertLocation(Extension::Location extension_location);
 
   std::set<std::string>* whitelist() { return &whitelist_; }
@@ skipping 65 matching lines @@
   Location location_;  // we only care about component/not-component now
   Platform platform_;  // we only care about chromeos/not-chromeos now
   int min_manifest_version_;
   int max_manifest_version_;
   chrome::VersionInfo::Channel channel_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_COMMON_EXTENSIONS_FEATURES_FEATURE_H_