Ensure all wire child objects are destroyed before their device

Destroying a device will implicit destroy all its child objects.
Attempting to use a child object after results in a fatal error.

Bug: dawn:384
Change-Id: I43c27c92cacde759be83cca79ac890f41bac3927
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/37002
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jiawei Shao <jiawei.shao@intel.com>

src/dawn_wire/client/Client.cpp

@@ -59,6 +59,9 @@ namespace dawn_wire { namespace client {
     void Client::DestroyAllObjects() {
         for (auto& objectList : mObjects) {
             ObjectType objectType = static_cast<ObjectType>(&objectList - mObjects.data());
+            if (objectType == ObjectType::Device) {
+                continue;
+            }
             while (!objectList.empty()) {
                 ObjectBase* object = objectList.head()->value();
 
@@ -69,6 +72,16 @@ namespace dawn_wire { namespace client {
                 FreeObject(objectType, object);
             }
         }
+
+        while (!mObjects[ObjectType::Device].empty()) {
+            ObjectBase* object = mObjects[ObjectType::Device].head()->value();
+
+            DestroyObjectCmd cmd;
+            cmd.objectType = ObjectType::Device;
+            cmd.objectId = object->id;
+            SerializeCommand(cmd);
+            FreeObject(ObjectType::Device, object);
+        }
     }
 
     WGPUDevice Client::GetDevice() {
@@ -85,6 +98,8 @@ namespace dawn_wire { namespace client {
         result.texture = ToAPI(allocation->object.get());
         result.id = allocation->object->id;
         result.generation = allocation->generation;
+        result.deviceId = FromAPI(device)->id;
+        result.deviceGeneration = DeviceAllocator().GetGeneration(FromAPI(device)->id);
         return result;
     }