[wasm] Move all heap-allocated WASM structures into wasm-objects.h.

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_instance();
-
-  bool SetBreakPoint(int byte_offset);
-
-  // Get the Script for the specified function.
-  static Script* GetFunctionScript(Handle<WasmDebugInfo> debug_info,
-                                   int func_index);
-
-  // Disassemble the specified function from this module.
-  static Handle<String> DisassembleFunction(Handle<WasmDebugInfo> debug_info,
-                                            int func_index);
-
-  // Get the offset table for the specified function, mapping from byte offsets
-  // to position in the disassembly.
-  // Returns an array with three entries per instruction: byte offset, line and
-  // column.
-  static Handle<FixedArray> GetFunctionOffsetTable(
-      Handle<WasmDebugInfo> debug_info, int func_index);
-
-  // Get the asm.js source position from a byte offset.
-  // Must only be called if the associated wasm object was created from asm.js.
-  static int GetAsmJsSourcePosition(Handle<WasmDebugInfo> debug_info,
-                                    int func_index, int byte_offset);
-};
-
-}  // namespace wasm
-}  // namespace internal
-}  // namespace v8
-
-#endif  // V8_WASM_DEBUG_H_