Factor RenderPass command validation

Validation of GPURenderBundle will share code with RenderPass
validation. Factor validation of commands for GPURenderBundle
into a separate function.

Bug: dawn:154
Change-Id: I79a229592ead27d462da0dd2d12fbdb95443ff19
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/9980
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
diff --git a/src/dawn_native/CommandValidation.h b/src/dawn_native/CommandValidation.h
new file mode 100644
index 0000000..2d29cb3
--- /dev/null
+++ b/src/dawn_native/CommandValidation.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 DAWNNATIVE_COMMANDVALIDATION_H_
+#define DAWNNATIVE_COMMANDVALIDATION_H_
+
+#include "dawn_native/CommandAllocator.h"
+#include "dawn_native/Error.h"
+
+#include <vector>
+
+namespace dawn_native {
+
+    struct BeginRenderPassCmd;
+    struct PassResourceUsage;
+
+    MaybeError ValidateRenderPass(CommandIterator* commands,
+                                  BeginRenderPassCmd* renderPass,
+                                  std::vector<PassResourceUsage>* perPassResourceUsages);
+    MaybeError ValidateComputePass(CommandIterator* commands,
+                                   std::vector<PassResourceUsage>* perPassResourceUsages);
+
+}  // namespace dawn_native
+
+#endif  // DAWNNATIVE_COMMANDVALIDATION_H_