[wasm] Implement WebAssembly.Module.customSections.

src/wasm/wasm-module.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_H_
 #define V8_WASM_MODULE_H_
 
 #include <memory>
 
 #include "src/api.h"
@@ skipping 401 matching lines @@
     ModuleOrigin origin, Handle<Script> asm_js_script,
     Vector<const byte> asm_offset_table);
 
 V8_EXPORT_PRIVATE bool IsWasmCodegenAllowed(Isolate* isolate,
                                             Handle<Context> context);
 
 V8_EXPORT_PRIVATE Handle<JSArray> GetImports(Isolate* isolate,
                                              Handle<WasmModuleObject> module);
 V8_EXPORT_PRIVATE Handle<JSArray> GetExports(Isolate* isolate,
                                              Handle<WasmModuleObject> module);
-
-V8_EXPORT_PRIVATE Handle<JSArray> GetExports(Isolate* isolate,
-                                             Handle<WasmModuleObject> module);
+V8_EXPORT_PRIVATE Handle<JSArray> GetCustomSections(
+    Isolate* isolate, Handle<WasmModuleObject> module, Handle<String> name,
+    ErrorThrower* thrower);
 
 V8_EXPORT_PRIVATE bool ValidateModuleBytes(Isolate* isolate, const byte* start,
                                            const byte* end,
                                            ErrorThrower* thrower,
                                            ModuleOrigin origin);
 
 // Get the offset of the code of a function within a module.
 int GetFunctionCodeOffset(Handle<WasmCompiledModule> compiled_module,
                           int func_index);
 
@@ skipping 35 matching lines @@
 void ValidateModuleState(Isolate* isolate, Handle<WasmModuleObject> module_obj);
 void ValidateOrphanedInstance(Isolate* isolate,
                               Handle<WasmInstanceObject> instance);
 
 }  // namespace testing
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_WASM_MODULE_H_