Mojo C++ bindings: make SyncHandleRegistry a ref-counted object.

content/renderer/usb/web_usb_client_impl.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 "content/renderer/usb/web_usb_client_impl.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/memory/ptr_util.h"
 #include "base/move.h"
+#include "base/stl_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/child/mojo/type_converters.h"
 #include "content/child/scoped_web_callbacks.h"
 #include "content/public/common/service_registry.h"
 #include "content/renderer/usb/type_converters.h"
 #include "content/renderer/usb/web_usb_device_impl.h"
 #include "mojo/public/cpp/bindings/array.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
 #include "third_party/WebKit/public/platform/WebCallbacks.h"
 #include "third_party/WebKit/public/platform/modules/webusb/WebUSBDeviceFilter.h"
@@ skipping 144 matching lines @@
   for (size_t i = 0; i < notification->devices_removed.size(); ++i) {
     const device::usb::DeviceInfoPtr& device_info =
         notification->devices_removed[i];
     for (auto observer : observers_)
       observer->onDeviceDisconnected(base::WrapUnique(new WebUSBDeviceImpl(
           nullptr, mojo::ConvertTo<blink::WebUSBDeviceInfo>(device_info))));
   }
 }
 
 }  // namespace content