tint->dawn: Move src/include -> include

Also simplify the target names.

Bug: dawn:1275
Change-Id: I2929b70897f64903b91b693b48c2e8dd7c11d07b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/79102
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Ben Clayton <bclayton@google.com>

include/dawn/native/MetalBackend.h

@@ -0,0 +1,71 @@
+// Copyright 2018 The Dawn Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef DAWNNATIVE_METALBACKEND_H_
+#define DAWNNATIVE_METALBACKEND_H_
+
+#include <dawn/dawn_wsi.h>
+#include <dawn/native/DawnNative.h>
+
+// The specifics of the Metal backend expose types in function signatures that might not be
+// available in dependent's minimum supported SDK version. Suppress all availability errors using
+// clang's pragmas. Dependents using the types without guarded availability will still get errors
+// when using the types.
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunguarded-availability"
+
+struct __IOSurface;
+typedef __IOSurface* IOSurfaceRef;
+
+#ifdef __OBJC__
+#    import <Metal/Metal.h>
+#endif  //__OBJC__
+
+namespace dawn::native::metal {
+
+    struct DAWN_NATIVE_EXPORT AdapterDiscoveryOptions : public AdapterDiscoveryOptionsBase {
+        AdapterDiscoveryOptions();
+    };
+
+    struct DAWN_NATIVE_EXPORT ExternalImageDescriptorIOSurface : ExternalImageDescriptor {
+      public:
+        ExternalImageDescriptorIOSurface();
+
+        IOSurfaceRef ioSurface;
+        uint32_t plane;
+    };
+
+    DAWN_NATIVE_EXPORT WGPUTexture
+    WrapIOSurface(WGPUDevice device, const ExternalImageDescriptorIOSurface* descriptor);
+
+    // When making Metal interop with other APIs, we need to be careful that QueueSubmit doesn't
+    // mean that the operations will be visible to other APIs/Metal devices right away. macOS
+    // does have a global queue of graphics operations, but the command buffers are inserted there
+    // when they are "scheduled". Submitting other operations before the command buffer is
+    // scheduled could lead to races in who gets scheduled first and incorrect rendering.
+    DAWN_NATIVE_EXPORT void WaitForCommandsToBeScheduled(WGPUDevice device);
+
+}  // namespace dawn::native::metal
+
+#ifdef __OBJC__
+namespace dawn::native::metal {
+
+    DAWN_NATIVE_EXPORT id<MTLDevice> GetMetalDevice(WGPUDevice device);
+
+}  // namespace dawn::native::metal
+#endif  // __OBJC__
+
+#pragma clang diagnostic pop
+
+#endif  // DAWNNATIVE_METALBACKEND_H_