[wasm] [asmjs] Route asm.js warnings to the dev console.

src/asmjs/asm-js.cc

Index: src/asmjs/asm-js.cc
diff --git a/src/asmjs/asm-js.cc b/src/asmjs/asm-js.cc
index 191daed57f2d5fcafb9ea150cf969e9b746efd53..f8bef44af4bc4c8319fc78cdc7bc38c82db946f9 100644
--- a/src/asmjs/asm-js.cc
+++ b/src/asmjs/asm-js.cc
@@ -157,7 +157,7 @@ MaybeHandle<FixedArray> AsmJs::ConvertAsmToWasm(ParseInfo* info) {
                        info->literal());
   if (!typer.Validate()) {
     DCHECK(!info->isolate()->has_pending_exception());
-    PrintF("Validation of asm.js module failed: %s\n", typer.error_message());
+    Utils::ReportAsmJsWarning(typer.error_message());
     return MaybeHandle<FixedArray>();
   }
   v8::internal::wasm::AsmWasmBuilder builder(info->isolate(), info->zone(),