Remove remaining calls to deprecated MessageLoop methods.

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

 // Copyright 2015 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 "base/bind.h"
 #include "base/callback.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 111 matching lines @@
 
 class BindingCallbackTest : public testing::Test {
  public:
   BindingCallbackTest() {}
   ~BindingCallbackTest() override {}
 
  protected:
   int32_t last_client_callback_value_seen_;
   sample::ProviderPtr interface_ptr_;
 
-  void PumpMessages() { loop_.RunUntilIdle(); }
+  void PumpMessages() { base::RunLoop().RunUntilIdle(); }
 
  private:
   base::MessageLoop loop_;
 };
 
 // Tests that the InterfacePtr and the Binding can communicate with each
 // other normally.
 TEST_F(BindingCallbackTest, Basic) {
   // Create the ServerImpl and the Binding.
   InterfaceImpl server_impl;
@@ skipping 194 matching lines @@
   regex.clear();
 #endif  // OS_WIN
   EXPECT_DEATH_IF_SUPPORTED(server_impl.DeleteCallback(), regex.c_str());
 #endif  // (!defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)) &&
         // !defined(OS_ANDROID)
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace mojo