[wasm] Allocate a single script per wasm module

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_