[wasm] Split off debug info from wasm object

src/wasm/wasm-debug.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 V8_WASM_DEBUG_H_
+#define V8_WASM_DEBUG_H_
+
+#include "src/handles.h"
+#include "src/objects.h"
+
+namespace v8 {
+namespace internal {
+namespace wasm {
+
+class WasmDebugInfo : public FixedArray {
+ public:
+  static Handle<WasmDebugInfo> New(Handle<JSObject> wasm);
+
+  static bool IsDebugInfo(Object* object);
+  static WasmDebugInfo* cast(Object* object);
+
+  JSObject* wasm_object();
+
+  bool SetBreakPoint(int byte_offset);
+
+  // Disassemble the specified function from this module.
+  Handle<String> DisassembleFunction(int func_index);
+
+  // Get the offset table for the specified function.
+  // Returns an array with three entries per instruction: byte offset, line and
+  // column.
+  Handle<FixedArray> GetFunctionOffsetTable(int func_index);
+};
+
+}  // namespace wasm
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_WASM_DEBUG_H_