Add a library suitable for libfuzzer with a small unit test runner shell

test/fuzzer/fuzzer-support.h

+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef TEST_FUZZER_FUZZER_SUPPORT_H_
+#define TEST_FUZZER_FUZZER_SUPPORT_H_
+
+#include "include/v8.h"
+
+namespace v8_fuzzer {
+
+class FuzzerSupport {
+ public:
+  explicit FuzzerSupport(const char* executable_path);
+  ~FuzzerSupport();
+
+  static FuzzerSupport* Get();
+
+  v8::Isolate* GetIsolate();
+  v8::Local<v8::Context> GetContext();
+
+ private:
+  // Prevent copying. Not implemented.
+  FuzzerSupport(const FuzzerSupport&);
+  FuzzerSupport& operator=(const FuzzerSupport&);
+
+  class ArrayBufferAllocator;
+
+  v8::Platform* platform_;
+  ArrayBufferAllocator* allocator_;
+  v8::Isolate* isolate_;
+  v8::Global<v8::Context> context_;
+};
+
+}  // namespace
+
+#endif  //  TEST_FUZZER_FUZZER_SUPPORT_H_