[ES6 modules] Introduce ScriptModule::moduleRequests to access record.[[RequestedModules]]

third_party/WebKit/Source/bindings/core/v8/ScriptModule.cpp

 // Copyright 2017 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 "bindings/core/v8/ScriptModule.h"
 
 #include "bindings/core/v8/V8Binding.h"
 #include "core/dom/Modulator.h"
 #include "core/dom/ScriptModuleResolver.h"
 
@@ skipping 44 matching lines @@
   v8::TryCatch tryCatch(isolate);
   tryCatch.SetVerbose(true);
   v8::Local<v8::Value> result;
   if (!v8Call(V8ScriptRunner::evaluateModule(m_module->newLocal(isolate),
                                              scriptState->context(), isolate),
               result, tryCatch)) {
     // TODO(adamk): report error
   }
 }
 
+Vector<String> ScriptModule::moduleRequests(ScriptState* scriptState) {
+  if (isNull())
+    return Vector<String>();
+
+  v8::Local<v8::Module> module = m_module->newLocal(scriptState->isolate());
+
+  Vector<String> ret;
+
+  int length = module->GetModuleRequestsLength();
+  ret.reserveInitialCapacity(length);
+  for (int i = 0; i < length; ++i) {
+    v8::Local<v8::String> v8Name = module->GetModuleRequest(i);
+    ret.push_back(toCoreString(v8Name));
+  }
+  return ret;
+}
+
 v8::MaybeLocal<v8::Module> ScriptModule::resolveModuleCallback(
     v8::Local<v8::Context> context,
     v8::Local<v8::String> specifier,
     v8::Local<v8::Module> referrer) {
   v8::Isolate* isolate = context->GetIsolate();
   Modulator* modulator = V8PerContextData::from(context)->modulator();
   DCHECK(modulator);
 
   ScriptModule referrerRecord(isolate, referrer);
   ExceptionState exceptionState(isolate, ExceptionState::ExecutionContext,
                                 "ScriptModule", "resolveModuleCallback");
   ScriptModule resolved = modulator->scriptModuleResolver()->resolve(
       toCoreStringWithNullCheck(specifier), referrerRecord, exceptionState);
   if (resolved.isNull()) {
     DCHECK(exceptionState.hadException());
     return v8::MaybeLocal<v8::Module>();
   }
 
   DCHECK(!exceptionState.hadException());
   return v8::MaybeLocal<v8::Module>(resolved.m_module->newLocal(isolate));
 }
 
 }  // namespace blink