[asm.js] [wasm] Adds a UI flag for enabling the Wasm backend for Asm.js

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 68 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");
+  SetV8FlagIfHasSwitch(switches::kEnableAsmWasm, "--expose-wasm");

[bradnelson, 2016/08/02 23:46:06]

The flag is actually --validate-asm

[John, 2016/08/03 14:12:15]

unrelated to this CL, but the asm-wasm tests don't use --validate-asm, they use
--expose-wasm. Is this expected?

   SetV8FlagIfHasSwitch(switches::kEnableWasm, "--expose-wasm");
 
   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 14 matching lines @@
 
 void RenderProcessImpl::AddBindings(int bindings) {
   enabled_bindings_ |= bindings;
 }
 
 int RenderProcessImpl::GetEnabledBindings() const {
   return enabled_bindings_;
 }
 
 }  // namespace content