Remove remaining calls to deprecated MessageLoop methods.

mojo/public/cpp/bindings/tests/interface_ptr_unittest.cc

 // Copyright 2013 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 <stdint.h>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 177 matching lines @@
     }
   }
 
   int64_t integer_;
   base::Closure closure_;
 };
 
 class InterfacePtrTest : public testing::Test {
  public:
   InterfacePtrTest() {}
-  ~InterfacePtrTest() override { loop_.RunUntilIdle(); }
+  ~InterfacePtrTest() override { base::RunLoop().RunUntilIdle(); }
 
-  void PumpMessages() { loop_.RunUntilIdle(); }
+  void PumpMessages() { base::RunLoop().RunUntilIdle(); }
 
  private:
   base::MessageLoop loop_;
 };
 
 void SetFlagAndRunClosure(bool* flag, const base::Closure& closure) {
   *flag = true;
   closure.Run();
 }
 
@@ skipping 522 matching lines @@
   bool called = false;
   base::RunLoop loop;
   ptr->Ping(base::Bind(&SetFlagAndRunClosure, &called, loop.QuitClosure()));
   loop.Run();
   EXPECT_TRUE(called);
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace mojo