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/dawn_proc.h

@@ -0,0 +1,36 @@
+// Copyright 2019 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 DAWN_DAWN_PROC_H_
+#define DAWN_DAWN_PROC_H_
+
+#include "dawn/dawn_proc_table.h"
+#include "dawn/webgpu.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Sets the static proctable used by libdawn_proc to implement the Dawn entrypoints. Passing NULL
+// for `procs` sets up the null proctable that contains only null function pointers. It is the
+// default value of the proctable. Setting the proctable back to null is good practice when you
+// are done using libdawn_proc since further usage will cause a segfault instead of calling an
+// unexpected function.
+WGPU_EXPORT void dawnProcSetProcs(const DawnProcTable* procs);
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // DAWN_DAWN_PROC_H_