Remove the MessageLoop::DestructionObserver from mojo bindings.

device/usb/mojo/device_impl_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 "device/usb/mojo/device_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <map>
@@ skipping 138 matching lines @@
 
 class USBDeviceImplTest : public testing::Test {
  public:
   USBDeviceImplTest()
       : message_loop_(new base::MessageLoop),
         is_device_open_(false),
         allow_reset_(false) {}
 
   ~USBDeviceImplTest() override {}
 
+  void TearDown() override { base::RunLoop().RunUntilIdle(); }
+
  protected:
   MockPermissionProvider& permission_provider() { return permission_provider_; }
   MockUsbDevice& mock_device() { return *mock_device_.get(); }
   bool is_device_open() const { return is_device_open_; }
   MockUsbDeviceHandle& mock_handle() { return *mock_handle_.get(); }
 
   void set_allow_reset(bool allow_reset) { allow_reset_ = allow_reset; }
 
   // Creates a mock device and binds a Device proxy to a Device service impl
   // wrapping the mock device.
@@ skipping 726 matching lines @@
         base::Bind(&ExpectPacketsInAndThen, fake_inbound_data,
                    expected_transferred_lengths, loop.QuitClosure()));
     loop.Run();
   }
 
   EXPECT_CALL(mock_handle(), Close());
 }
 
 }  // namespace usb
 }  // namespace device