Add QueueBase::MakeError

Bug: dawn:68, chromium:1042598
Change-Id: I1cf97e29ecadb520e2641ea01ac6dcf7e908bbd3
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/15221
Commit-Queue: Natasha Lee <natlee@microsoft.com>
Reviewed-by: Austin Eng <enga@chromium.org>

src/dawn_native/Device.cpp

@@ -517,10 +517,7 @@ namespace dawn_native {
         QueueBase* result = nullptr;
 
         if (ConsumedError(CreateQueueInternal(&result))) {
-            // If queue creation failure ever becomes possible, we should implement MakeError and
-            // friends for them.
-            UNREACHABLE();
-            return nullptr;
+            return QueueBase::MakeError(this);
         }
 
         return result;

src/dawn_native/Queue.cpp

@@ -32,6 +32,19 @@ namespace dawn_native {
     QueueBase::QueueBase(DeviceBase* device) : ObjectBase(device) {
     }
 
+    QueueBase::QueueBase(DeviceBase* device, ObjectBase::ErrorTag tag) : ObjectBase(device, tag) {
+    }
+
+    // static
+    QueueBase* QueueBase::MakeError(DeviceBase* device) {
+        return new QueueBase(device, ObjectBase::kError);
+    }
+
+    MaybeError QueueBase::SubmitImpl(uint32_t commandCount, CommandBufferBase* const* commands) {
+        UNREACHABLE();
+        return {};
+    }
+
     void QueueBase::Submit(uint32_t commandCount, CommandBufferBase* const* commands) {
         DeviceBase* device = GetDevice();
         if (device->ConsumedError(device->ValidateIsAlive())) {

src/dawn_native/Queue.h

@@ -27,14 +27,17 @@ namespace dawn_native {
       public:
         QueueBase(DeviceBase* device);
 
+        static QueueBase* MakeError(DeviceBase* device);
+
         // Dawn API
         void Submit(uint32_t commandCount, CommandBufferBase* const* commands);
         void Signal(Fence* fence, uint64_t signalValue);
         Fence* CreateFence(const FenceDescriptor* descriptor);
 
       private:
-        virtual MaybeError SubmitImpl(uint32_t commandCount,
-                                      CommandBufferBase* const* commands) = 0;
+        QueueBase(DeviceBase* device, ObjectBase::ErrorTag tag);
+
+        virtual MaybeError SubmitImpl(uint32_t commandCount, CommandBufferBase* const* commands);
 
         MaybeError ValidateSubmit(uint32_t commandCount, CommandBufferBase* const* commands);
         MaybeError ValidateSignal(const Fence* fence, uint64_t signalValue);