Re-land fuzzing work with fix

Revert "Revert 3 fuzzing CLs, since they are preventing rolling into Chromium."

This reverts commit 1d9935cf37.

Also adjusts BUILD.gn file, so that Chromium build can find all the
needed symbols.

BUG=tint:58,tint:59,tint:193,tint:194,tint:199,tint:436

Change-Id: I3fe71ff52c8156f30fccfaab0bf7f647f158aea4
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/37460
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Auto-Submit: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: dan sinclair <dsinclair@chromium.org>

fuzzers/tint_all_transforms_fuzzer.cc

@@ -0,0 +1,36 @@
+// Copyright 2021 The Tint 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.
+
+#include "fuzzers/tint_common_fuzzer.h"
+
+namespace tint {
+namespace fuzzers {
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  tint::transform::Manager transform_manager;
+  transform_manager.append(
+      std::make_unique<tint::transform::BoundArrayAccessors>());
+  transform_manager.append(
+      std::make_unique<tint::transform::EmitVertexPointSize>());
+  transform_manager.append(
+      std::make_unique<tint::transform::FirstIndexOffset>(0, 0));
+
+  tint::fuzzers::CommonFuzzer fuzzer(InputFormat::kWGSL, OutputFormat::kSpv);
+  fuzzer.SetTransformManager(&transform_manager);
+
+  return fuzzer.Run(data, size);
+}
+
+}  // namespace fuzzers
+}  // namespace tint