Add missing include/webgpu copyrights.

This CL adds copyright headers to the two files in the include/webgpu
folder.

Bug: tint:1339
Change-Id: I6259ec0acd85d1ae9f6a8948d57ffa670d2cba6d
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/86361
Auto-Submit: Dan Sinclair <dsinclair@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
diff --git a/include/webgpu/CPPLINT.cfg b/include/webgpu/CPPLINT.cfg
deleted file mode 100644
index 88c6f99..0000000
--- a/include/webgpu/CPPLINT.cfg
+++ /dev/null
@@ -1 +0,0 @@
-filter=-legal/copyright
diff --git a/include/webgpu/webgpu.h b/include/webgpu/webgpu.h
index 0e3bc28..535045e 100644
--- a/include/webgpu/webgpu.h
+++ b/include/webgpu/webgpu.h
@@ -1,3 +1,17 @@
+// Copyright 2022 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 INCLUDE_WEBGPU_WEBGPU_H_
 #define INCLUDE_WEBGPU_WEBGPU_H_
 
diff --git a/include/webgpu/webgpu_cpp.h b/include/webgpu/webgpu_cpp.h
index 4f5ea4e..c8928cc 100644
--- a/include/webgpu/webgpu_cpp.h
+++ b/include/webgpu/webgpu_cpp.h
@@ -1,3 +1,17 @@
+// Copyright 2022 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 INCLUDE_WEBGPU_WEBGPU_CPP_H_
 #define INCLUDE_WEBGPU_WEBGPU_CPP_H_