[wasm] Throw a type error if an I64 is exported to JS.

src/runtime/runtime-wasm.cc

 // 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.
 
 #include "src/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/assembler.h"
 #include "src/compiler/wasm-compiler.h"
 #include "src/conversions.h"
@@ skipping 91 matching lines @@
 
   // Set new buffer to be wasm memory
   module_object->SetInternalField(kWasmMemArrayBuffer, *buffer);
 
   CHECK(wasm::UpdateWasmModuleMemory(module_object, old_mem_start,
                                      new_mem_start, old_size, new_size));
 
   return *isolate->factory()->NewNumberFromInt(old_size /
                                                wasm::WasmModule::kPageSize);
 }
+
+RUNTIME_FUNCTION(Runtime_WasmThrowTypeError) {
+  HandleScope scope(isolate);
+  DCHECK_EQ(0, args.length());
+  THROW_NEW_ERROR_RETURN_FAILURE(
+      isolate, NewTypeError(MessageTemplate::kWasmTrapTypeError));
+}
 }  // namespace internal
 }  // namespace v8