[wasm] Change WebAssembly flags option to only cover structured cloning.

content/renderer/render_process_impl.cc

 // Copyright (c) 2012 The Chromium 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 "content/renderer/render_process_impl.h"
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
@@ skipping 51 matching lines @@
 
 const base::Feature kV8SerializeAgeCodeFeature{
     "V8_Serialize_Age_Code", base::FEATURE_DISABLED_BY_DEFAULT};
 
 void SetV8FlagIfFeature(const base::Feature& feature, const char* v8_flag) {
   if (base::FeatureList::IsEnabled(feature)) {
     v8::V8::SetFlagsFromString(v8_flag, strlen(v8_flag));
   }
 }
 
+void SetV8FlagIfNotFeature(const base::Feature& feature, const char* v8_flag) {
+  if (!base::FeatureList::IsEnabled(feature)) {
+    v8::V8::SetFlagsFromString(v8_flag, strlen(v8_flag));
+  }
+}
+
 void SetV8FlagIfHasSwitch(const char* switch_name, const char* v8_flag) {
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(switch_name)) {
     v8::V8::SetFlagsFromString(v8_flag, strlen(v8_flag));
   }
 }
 
 std::vector<base::SchedulerWorkerPoolParams>
 GetDefaultSchedulerWorkerPoolParams() {
   using StandbyThreadPolicy =
       base::SchedulerWorkerPoolParams::StandbyThreadPolicy;
@@ skipping 82 matching lines @@
 
   SetV8FlagIfFeature(kV8_ES2015_TailCalls_Feature, "--harmony-tailcalls");
   SetV8FlagIfFeature(kV8_ES2016_ExplicitTailCalls_Feature,
                      "--harmony-explicit-tailcalls");
   SetV8FlagIfFeature(kV8SerializeEagerFeature, "--serialize_eager");
   SetV8FlagIfFeature(kV8SerializeAgeCodeFeature, "--serialize_age_code");
   SetV8FlagIfHasSwitch(switches::kDisableJavaScriptHarmonyShipping,
                        "--noharmony-shipping");
   SetV8FlagIfHasSwitch(switches::kJavaScriptHarmony, "--harmony");
   SetV8FlagIfFeature(features::kAsmJsToWebAssembly, "--validate-asm");
-  SetV8FlagIfFeature(features::kWebAssembly, "--expose-wasm");
+  SetV8FlagIfNotFeature(features::kWebAssembly,
+                        "--wasm-disable-structured-cloning");
   SetV8FlagIfFeature(features::kSharedArrayBuffer,
                      "--harmony-sharedarraybuffer");
 
   const base::CommandLine& command_line =
       *base::CommandLine::ForCurrentProcess();
 
   if (command_line.HasSwitch(switches::kJavaScriptFlags)) {
     std::string flags(
         command_line.GetSwitchValueASCII(switches::kJavaScriptFlags));
     v8::V8::SetFlagsFromString(flags.c_str(), static_cast<int>(flags.size()));
@@ skipping 33 matching lines @@
     index_to_traits_callback =
         base::Bind(&DefaultRendererWorkerPoolIndexForTraits);
   }
   DCHECK(index_to_traits_callback);
 
   base::TaskScheduler::CreateAndSetDefaultTaskScheduler(
       params_vector, index_to_traits_callback);
 }
 
 }  // namespace content