[wasm] Allocate a single script per wasm module

src/wasm/module-decoder.h

 // Copyright 2015 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_MODULE_DECODER_H_
 #define V8_WASM_MODULE_DECODER_H_
 
 #include "src/globals.h"
 #include "src/wasm/ast-decoder.h"
 #include "src/wasm/wasm-module.h"
@@ skipping 26 matching lines @@
 // Decodes the bytes of a WASM function between
 // {function_start} and {function_end}.
 V8_EXPORT_PRIVATE FunctionResult DecodeWasmFunction(Isolate* isolate,
                                                     Zone* zone, ModuleEnv* env,
                                                     const byte* function_start,
                                                     const byte* function_end);
 
 // Extracts the function offset table from the wasm module bytes.
 // Returns a vector with <offset, length> entries, or failure if the wasm bytes
 // are detected as invalid. Note that this validation is not complete.
-FunctionOffsetsResult DecodeWasmFunctionOffsets(
-    const byte* module_start, const byte* module_end,
-    uint32_t num_imported_functions);
+FunctionOffsetsResult DecodeWasmFunctionOffsets(const byte* module_start,
+                                                const byte* module_end);
 
 V8_EXPORT_PRIVATE WasmInitExpr DecodeWasmInitExprForTesting(const byte* start,
                                                             const byte* end);
 
 // Extracts the mapping from wasm byte offset to asm.js source position per
 // function.
 // Returns a vector of vectors with <byte_offset, source_position> entries, or
 // failure if the wasm bytes are detected as invalid. Note that this validation
 // is not complete.
 AsmJsOffsetsResult DecodeAsmJsOffsets(const byte* module_start,
-                                      const byte* module_end,
-                                      uint32_t num_imported_functions);
+                                      const byte* module_end);
 
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_WASM_MODULE_DECODER_H_