Make args() accessors const

mojo/application_manager/application_manager_unittest.cc

 // 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.
 
 #include "base/at_exit.h"
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "mojo/application_manager/application_loader.h"
 #include "mojo/application_manager/application_manager.h"
@@ skipping 90 matching lines @@
   TestApplicationLoader() : context_(NULL), num_loads_(0) {}
 
   virtual ~TestApplicationLoader() {
     if (context_)
       ++context_->num_loader_deletes;
     test_app_.reset(NULL);
   }
 
   void set_context(TestContext* context) { context_ = context; }
   int num_loads() const { return num_loads_; }
-  const std::vector<std::string>& GetArgs() { return test_app_->args(); }
+  const std::vector<std::string>& GetArgs() const { return test_app_->args(); }
 
  private:
   // ApplicationLoader implementation.
   virtual void Load(ApplicationManager* manager,
                     const GURL& url,
                     scoped_refptr<LoadCallbacks> callbacks) override {
     ++num_loads_;
     test_app_.reset(
         new ApplicationImpl(this, callbacks->RegisterApplication().Pass()));
   }
@@ skipping 552 matching lines @@
   std::string url("test:test3");
   TestServicePtr test_service;
   application_manager_->ConnectToService(GURL(url), &test_service);
 
   EXPECT_EQ(1, interceptor.call_count());
   EXPECT_EQ(url, interceptor.url_spec());
   EXPECT_EQ(1, default_loader->num_loads());
 }
 
 }  // namespace mojo