cros: Add e2e tests for new_note action handler. Flip feature to stable.

extensions/common/manifest_handlers/action_handlers_handler_unittest.cc

 // Copyright 2017 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 "base/test/values_test_util.h"
 #include "components/version_info/version_info.h"
 #include "extensions/common/features/feature_channel.h"
 #include "extensions/common/manifest_constants.h"
 #include "extensions/common/manifest_handlers/action_handlers_handler.h"
 #include "extensions/common/manifest_test.h"
@@ skipping 30 matching lines @@
       const Extension* extension) {
     ActionHandlersInfo* info = static_cast<ActionHandlersInfo*>(
         extension->GetManifestData(manifest_keys::kActionHandlers));
     return info ? info->action_handlers : std::set<app_runtime::ActionType>();
   }
 };
 
 }  // namespace
 
 TEST_F(ActionHandlersManifestTest, InvalidType) {
-  extensions::ScopedCurrentChannel channel(version_info::Channel::DEV);
   LoadAndExpectError(CreateManifest("32"),
                      manifest_errors::kInvalidActionHandlersType);
   LoadAndExpectError(CreateManifest("[true]"),
                      manifest_errors::kInvalidActionHandlersType);
   LoadAndExpectError(CreateManifest("[\"invalid_handler\"]"),
                      manifest_errors::kInvalidActionHandlersActionType);
 }
 
 TEST_F(ActionHandlersManifestTest, VerifyParse) {
-  extensions::ScopedCurrentChannel channel(version_info::Channel::DEV);
   scoped_refptr<Extension> none = LoadAndExpectSuccess(CreateManifest("[]"));
   EXPECT_EQ(std::set<app_runtime::ActionType>{}, GetActionHandlers(none.get()));
 
   scoped_refptr<Extension> new_note =
       LoadAndExpectSuccess(CreateManifest("[\"new_note\"]"));
   EXPECT_EQ(
       std::set<app_runtime::ActionType>{app_runtime::ACTION_TYPE_NEW_NOTE},
       GetActionHandlers(new_note.get()));
 }
 
 }  // namespace extensions