fix const reference declaration

components/offline_pages/background/request_coordinator.h

 // Copyright 2016 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 COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_COORDINATOR_H_
 #define COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_COORDINATOR_H_
 
 #include <memory>
 
 #include "base/callback.h"
@@ skipping 41 matching lines @@
   bool StartProcessing(const DeviceConditions& device_conditions,
                        const base::Callback<void(bool)>& callback);
 
   // Stops the current request processing if active. This is a way for
   // caller to abort processing; otherwise, processing will complete on
   // its own. In either case, the callback will be called when processing
   // is stopped or complete.
   void StopProcessing();
 
   // TODO(dougarnett): Move to OfflinerPolicy in some form.
-  Scheduler::TriggerConditions const& GetTriggerConditionsForUserRequest();
+  const Scheduler::TriggerConditions& GetTriggerConditionsForUserRequest();
 
   // A way for tests to set the callback in use when an operation is over.
   void SetProcessingCallbackForTest(const base::Callback<void(bool)> callback) {
     scheduler_callback_ = callback;
   }
 
   // Returns the request queue used for requests.  Coordinator keeps ownership.
   RequestQueue* queue() { return queue_.get(); }
 
   // Return an unowned pointer to the Scheduler.
@@ skipping 65 matching lines @@
   base::Callback<void(bool)> scheduler_callback_;
   // Allows us to pass a weak pointer to callbacks.
   base::WeakPtrFactory<RequestCoordinator> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RequestCoordinator);
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_COORDINATOR_H_