ozone/wayland: Fix wayland_data_device_manager leak

Bug: 855588
Test: ozone_unittests
Change-Id: I29ca5cc777d1e835bb2279959d9a390e2475025d
Reviewed-on: https://chromium-review.googlesource.com/1112961
Commit-Queue: Nico Weber <thakis@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Reviewed-by: Antonio Gomes <tonikitoo@igalia.com>
Cr-Commit-Position: refs/heads/master@{#569936}

ui/ozone/platform/wayland/wayland_data_device_manager.cc

@@ -16,12 +16,12 @@ WaylandDataDeviceManager::~WaylandDataDeviceManager() = default;
 
 wl_data_device* WaylandDataDeviceManager::GetDevice() {
   DCHECK(connection_->seat());
-  return wl_data_device_manager_get_data_device(device_manager_,
+  return wl_data_device_manager_get_data_device(device_manager_.get(),
                                                 connection_->seat());
 }
 
 wl_data_source* WaylandDataDeviceManager::CreateSource() {
-  return wl_data_device_manager_create_data_source(device_manager_);
+  return wl_data_device_manager_create_data_source(device_manager_.get());
 }
 
 }  // namespace ui

ui/ozone/platform/wayland/wayland_data_device_manager.h

@@ -9,6 +9,7 @@
 
 #include "base/logging.h"
 #include "base/macros.h"
+#include "ui/ozone/platform/wayland/wayland_object.h"
 
 namespace ui {
 
@@ -28,7 +29,7 @@ class WaylandDataDeviceManager {
   }
 
  private:
-  wl_data_device_manager* device_manager_;
+  wl::Object<wl_data_device_manager> device_manager_;
 
   WaylandConnection* connection_ = nullptr;