[wasm] Names of exported functions should be the stringified function index.

test/cctest/wasm/wasm-run-utils.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 WASM_RUN_UTILS_H
 #define WASM_RUN_UTILS_H
 
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
@@ skipping 190 matching lines @@
     uint32_t index = AddFunction(sig, Handle<Code>::null());
     Handle<Code> code =
         CompileWasmToJSWrapper(isolate_, jsfunc, sig, index,
                                Handle<String>::null(), Handle<String>::null());
     instance->function_code[index] = code;
     return index;
   }
 
   Handle<JSFunction> WrapCode(uint32_t index) {
     // Wrap the code so it can be called as a JS function.
-    Handle<String> name = isolate_->factory()->NewStringFromStaticChars("main");
     Handle<WasmInstanceObject> instance_obj(0, isolate_);
     Handle<Code> code = instance->function_code[index];
     WasmJs::InstallWasmMapsIfNeeded(isolate_, isolate_->native_context());
     Handle<Code> ret_code =
         compiler::CompileJSToWasmWrapper(isolate_, &module_, code, index);
     Handle<JSFunction> ret = WasmExportedFunction::New(
-        isolate_, instance_obj, name, ret_code,
+        isolate_, instance_obj, MaybeHandle<String>(), static_cast<int>(index),
         static_cast<int>(this->module->functions[index].sig->parameter_count()),
-        static_cast<int>(index));
+        ret_code);
     return ret;
   }
 
   void SetFunctionCode(uint32_t index, Handle<Code> code) {
     instance->function_code[index] = code;
   }
 
   void AddIndirectFunctionTable(uint16_t* function_indexes,
                                 uint32_t table_size) {
     module_.function_tables.push_back({table_size, table_size, true,
@@ skipping 567 matching lines @@
   void RunWasm_##name(WasmExecutionMode execution_mode)
 
 #define WASM_EXEC_COMPILED_TEST(name)                                \
   void RunWasm_##name(WasmExecutionMode execution_mode);             \
   TEST(RunWasmCompiled_##name) { RunWasm_##name(kExecuteCompiled); } \
   void RunWasm_##name(WasmExecutionMode execution_mode)
 
 }  // namespace
 
 #endif