wasm: add flag to dump modules

src/wasm/wasm-js.cc

 // 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.
 
 #include "src/api.h"
 #include "src/api-natives.h"
 #include "src/assert-scope.h"
 #include "src/ast/ast.h"
 #include "src/ast/scopes.h"
 #include "src/factory.h"
@@ skipping 134 matching lines @@
   if (!typer.Validate()) {
     thrower->Error("Asm.js validation failed: %s", typer.error_message());
     return nullptr;
   }
 
   auto module =
       v8::internal::wasm::AsmWasmBuilder(info->isolate(), info->zone(),
                                          info->literal(), foreign, &typer)
           .Run();
 
-  if (i::FLAG_dump_asmjs_wasm) {
-    FILE* wasm_file = fopen(i::FLAG_asmjs_wasm_dumpfile, "wb");
-    if (wasm_file) {
-      fwrite(module->Begin(), module->End() - module->Begin(), 1, wasm_file);
-      fclose(wasm_file);
-    }
-  }
-
   return module;
 }
 
 void InstantiateModuleCommon(const v8::FunctionCallbackInfo<v8::Value>& args,
                              const byte* start, const byte* end,
                              ErrorThrower* thrower,
                              internal::wasm::ModuleOrigin origin) {
   i::Isolate* isolate = reinterpret_cast<i::Isolate*>(args.GetIsolate());
 
   i::Handle<i::JSArrayBuffer> memory = i::Handle<i::JSArrayBuffer>::null();
@@ skipping 152 matching lines @@
     int unused_property_fields = in_object_properties - pre_allocated;
     Handle<Map> map = Map::CopyInitialMap(
         prev_map, instance_size, in_object_properties, unused_property_fields);
 
     context->set_wasm_function_map(*map);
   }
 }
 
 }  // namespace internal
 }  // namespace v8