Make args() accessors const

mojo/public/cpp/application/application_impl.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 MOJO_PUBLIC_APPLICATION_APPLICATION_IMPL_H_
 #define MOJO_PUBLIC_APPLICATION_APPLICATION_IMPL_H_
 #include <vector>
 
 #include "mojo/public/cpp/application/application_connection.h"
 #include "mojo/public/cpp/application/lib/service_connector.h"
@@ skipping 42 matching lines @@
 class ApplicationImpl : public InterfaceImpl<Application> {
  public:
   ApplicationImpl(ApplicationDelegate* delegate,
                   ScopedMessagePipeHandle shell_handle);
   ApplicationImpl(ApplicationDelegate* delegate, MojoHandle shell_handle);
   virtual ~ApplicationImpl();
 
   Shell* shell() const { return shell_.get(); }
 
   // Returns any initial configuration arguments, passed by the Shell.
-  const std::vector<std::string>& args() { return args_; }
+  const std::vector<std::string>& args() const { return args_; }
 
   // Establishes a new connection to an application. Caller does not own.
   ApplicationConnection* ConnectToApplication(const String& application_url);
 
   // Connect to application identified by |application_url| and connect to the
   // service implementation of the interface identified by |Interface|.
   template <typename Interface>
   void ConnectToService(const std::string& application_url,
                         InterfacePtr<Interface>* ptr) {
     ConnectToApplication(application_url)->ConnectToService(ptr);
@@ skipping 29 matching lines @@
   ShellPtr shell_;
   ShellPtrWatcher* shell_watch_;
   std::vector<std::string> args_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(ApplicationImpl);
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_APPLICATION_APPLICATION_IMPL_H_