[ES6 modules] Introduce ReferrerScriptInfo

This CL implements ReferrerScriptInfo, which holds a copy of "referencing
script" info, referenced in the "HostImportModuleDynamically" algorithm:
https://github.com/tc39/proposal-dynamic-import/blob/master/HTML%20Integration.md#hostimportmoduledynamicallyreferencingscriptormodule-specifier-promisecapability

This info can be encoded into v8::Local<v8::PrimitiveArray> and will be
attached to v8::ScriptOrigin in future CLs. Dynamic import resolver will
extract this from the ScriptOrigin of the referencing script in its
implementation of "HostImportModuleDynamically" algorithm.

Bug: 711706
Change-Id: I0649b6f0334154cdde910a657eee449b39f5f9c7
Reviewed-on: https://chromium-review.googlesource.com/668257Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Kouhei Ueno <kouhei@chromium.org>
Cr-Commit-Position: refs/heads/master@{#502176}

third_party/WebKit/Source/bindings/bindings.gni

@@ -29,8 +29,6 @@ bindings_core_v8_files =
                     "core/v8/BindingSecurity.cpp",
                     "core/v8/BindingSecurity.h",
                     "core/v8/CallbackPromiseAdapter.h",
-                    "core/v8/V0CustomElementConstructorBuilder.cpp",
-                    "core/v8/V0CustomElementConstructorBuilder.h",
                     "core/v8/Dictionary.cpp",
                     "core/v8/Dictionary.h",
                     "core/v8/DictionaryHelperForBindings.h",
@@ -54,6 +52,8 @@ bindings_core_v8_files =
                     "core/v8/NativeValueTraits.h",
                     "core/v8/NativeValueTraitsImpl.h",
                     "core/v8/Nullable.h",
+                    "core/v8/ReferrerScriptInfo.cpp",
+                    "core/v8/ReferrerScriptInfo.h",
                     "core/v8/RejectedPromises.cpp",
                     "core/v8/RejectedPromises.h",
                     "core/v8/RemoteWindowProxy.cpp",
@@ -100,6 +100,8 @@ bindings_core_v8_files =
                     "core/v8/ToV8ForCore.h",
                     "core/v8/UseCounterCallback.cpp",
                     "core/v8/UseCounterCallback.h",
+                    "core/v8/V0CustomElementConstructorBuilder.cpp",
+                    "core/v8/V0CustomElementConstructorBuilder.h",
                     "core/v8/V8AbstractEventListener.cpp",
                     "core/v8/V8AbstractEventListener.h",
                     "core/v8/V8BindingForCore.cpp",
@@ -111,17 +113,15 @@ bindings_core_v8_files =
                     "core/v8/V8DOMActivityLogger.h",
                     "core/v8/V8DOMConfiguration.cpp",
                     "core/v8/V8DOMConfiguration.h",
-                    "core/v8/V8ThrowDOMException.cpp",
-                    "core/v8/V8ThrowDOMException.h",
                     "core/v8/V8ErrorHandler.cpp",
                     "core/v8/V8ErrorHandler.h",
                     "core/v8/V8EventListener.cpp",
                     "core/v8/V8EventListener.h",
+                    "core/v8/V8EventListenerHelper.cpp",
+                    "core/v8/V8EventListenerHelper.h",
                     "core/v8/V8EventListenerInfo.h",
                     "core/v8/V8GCController.cpp",
                     "core/v8/V8GCController.h",
-                    "core/v8/V8EventListenerHelper.cpp",
-                    "core/v8/V8EventListenerHelper.h",
                     "core/v8/V8GCForContextDispose.cpp",
                     "core/v8/V8GCForContextDispose.h",
                     "core/v8/V8HTMLConstructor.cpp",
@@ -131,6 +131,8 @@ bindings_core_v8_files =
                     "core/v8/V8Initializer.h",
                     "core/v8/V8IntersectionObserverDelegate.cpp",
                     "core/v8/V8IntersectionObserverDelegate.h",
+                    "core/v8/V8ThrowDOMException.cpp",
+                    "core/v8/V8ThrowDOMException.h",
                     "core/v8/V8IteratorResultValue.cpp",
                     "core/v8/V8IteratorResultValue.h",
                     "core/v8/V8LazyEventListener.cpp",
@@ -188,17 +190,18 @@ bindings_unittest_files =
           "core/v8/IDLTypesTest.cpp",
           "core/v8/NativeValueTraitsImplTest.cpp",
           "core/v8/NativeValueTraitsTest.cpp",
+          "core/v8/ReferrerScriptInfoTest.cpp",
           "core/v8/ScriptModuleTest.cpp",
           "core/v8/ScriptPromisePropertyTest.cpp",
           "core/v8/ScriptPromiseResolverTest.cpp",
           "core/v8/ScriptPromiseTest.cpp",
-          "core/v8/WindowProxyTest.cpp",
           "core/v8/ScriptStreamerTest.cpp",
           "core/v8/ScriptWrappableVisitorTest.cpp",
           "core/v8/ToV8Test.cpp",
           "core/v8/TraceWrapperMemberTest.cpp",
           "core/v8/V8BindingForTesting.cpp",
           "core/v8/V8BindingForTesting.h",
+          "core/v8/WindowProxyTest.cpp",
           "core/v8/V8BindingTest.cpp",
           "core/v8/V8ObjectBuilderTest.cpp",
           "core/v8/V8ScriptRunnerTest.cpp",

third_party/WebKit/Source/bindings/core/v8/ReferrerScriptInfo.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/ReferrerScriptInfo.h"
+
+#include "bindings/core/v8/V8BindingForCore.h"
+#include "v8/include/v8.h"
+
+namespace blink {
+
+namespace {
+
+enum HostDefinedOptionsIndex : size_t {
+  kCredentialsMode,
+  kNonce,
+  kParserState,
+  kLength
+};
+
+}  // namespace
+
+ReferrerScriptInfo ReferrerScriptInfo::FromV8HostDefinedOptions(
+    v8::Local<v8::Context> context,
+    v8::Local<v8::PrimitiveArray> host_defined_options) {
+  if (host_defined_options.IsEmpty() || !host_defined_options->Length()) {
+    String empty_nonce;
+    return ReferrerScriptInfo(WebURLRequest::kFetchCredentialsModeOmit,
+                              empty_nonce, kNotParserInserted);
+  }
+
+  v8::Local<v8::Primitive> credentials_mode_value =
+      host_defined_options->Get(kCredentialsMode);
+  WebURLRequest::FetchCredentialsMode credentials_mode =
+      static_cast<WebURLRequest::FetchCredentialsMode>(
+          credentials_mode_value->IntegerValue(context).ToChecked());
+
+  v8::Local<v8::Primitive> nonce_value = host_defined_options->Get(kNonce);
+  String nonce =
+      ToCoreStringWithNullCheck(v8::Local<v8::String>::Cast(nonce_value));
+
+  v8::Local<v8::Primitive> parser_state_value =
+      host_defined_options->Get(kParserState);
+  ParserDisposition parser_state = static_cast<ParserDisposition>(
+      parser_state_value->IntegerValue(context).ToChecked());
+
+  return ReferrerScriptInfo(credentials_mode, nonce, parser_state);
+}
+
+v8::Local<v8::PrimitiveArray> ReferrerScriptInfo::ToV8HostDefinedOptions(
+    v8::Isolate* isolate) const {
+  v8::Local<v8::PrimitiveArray> host_defined_options =
+      v8::PrimitiveArray::New(isolate, HostDefinedOptionsIndex::kLength);
+
+  v8::Local<v8::Primitive> credentials_mode_value =
+      v8::Integer::NewFromUnsigned(isolate,
+                                   static_cast<uint32_t>(credentials_mode_));
+  host_defined_options->Set(HostDefinedOptionsIndex::kCredentialsMode,
+                            credentials_mode_value);
+
+  v8::Local<v8::Primitive> nonce_value = V8String(isolate, nonce_);
+  host_defined_options->Set(HostDefinedOptionsIndex::kNonce, nonce_value);
+
+  v8::Local<v8::Primitive> parser_state_value = v8::Integer::NewFromUnsigned(
+      isolate, static_cast<uint32_t>(parser_state_));
+  host_defined_options->Set(HostDefinedOptionsIndex::kParserState,
+                            parser_state_value);
+
+  return host_defined_options;
+}
+
+}  // namespace blink

third_party/WebKit/Source/bindings/core/v8/ReferrerScriptInfo.h

+// 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.
+
+#ifndef ReferrerScriptInfo_h
+#define ReferrerScriptInfo_h
+
+#include "core/CoreExport.h"
+#include "platform/loader/fetch/AccessControlStatus.h"
+#include "platform/loader/fetch/ResourceLoaderOptions.h"
+#include "platform/wtf/text/TextPosition.h"
+#include "platform/wtf/text/WTFString.h"
+#include "public/platform/WebURLRequest.h"
+#include "v8/include/v8.h"
+
+namespace blink {
+
+// ReferrerScriptInfo carries a copy of "referencing script's" info referenced
+// in HTML Spec: "HostImportModuleDynamically" algorithm.
+// https://github.com/tc39/proposal-dynamic-import/blob/master/HTML%20Integration.md#hostimportmoduledynamicallyreferencingscriptormodule-specifier-promisecapability
+class CORE_EXPORT ReferrerScriptInfo {
+ public:
+  ReferrerScriptInfo() {}
+  ReferrerScriptInfo(WebURLRequest::FetchCredentialsMode credentials_mode,
+                     const String& nonce,
+                     ParserDisposition parser_state)
+      : credentials_mode_(credentials_mode),
+        nonce_(nonce),
+        parser_state_(parser_state) {}
+
+  static ReferrerScriptInfo FromV8HostDefinedOptions(
+      v8::Local<v8::Context>,
+      v8::Local<v8::PrimitiveArray>);
+  v8::Local<v8::PrimitiveArray> ToV8HostDefinedOptions(v8::Isolate*) const;
+
+  WebURLRequest::FetchCredentialsMode CredentialsMode() const {
+    return credentials_mode_;
+  }
+  const String& Nonce() const { return nonce_; }
+  ParserDisposition ParserState() const { return parser_state_; }
+
+ private:
+  // Spec: "referencing script's credentials mode"
+  // The default value is "omit", from Step 5 of [HIMD].
+  // [HIMD]
+  // https://github.com/tc39/proposal-dynamic-import/blob/master/HTML%20Integration.md#hostimportmoduledynamicallyreferencingscriptormodule-specifier-promisecapability
+  WebURLRequest::FetchCredentialsMode credentials_mode_ =
+      WebURLRequest::kFetchCredentialsModeOmit;
+  // Spec: "referencing script's cryptographic nonce"
+  String nonce_;
+  // Spec: "referencing script's parser state"
+  ParserDisposition parser_state_ = kNotParserInserted;
+};
+
+}  // namespace blink
+
+#endif  // ReferrerScriptInfo_h

third_party/WebKit/Source/bindings/core/v8/ReferrerScriptInfoTest.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/ReferrerScriptInfo.h"
+
+#include "bindings/core/v8/V8BindingForTesting.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "v8/include/v8.h"
+
+namespace blink {
+
+TEST(ReferrerScriptInfo, ToFromV8) {
+  V8TestingScope scope;
+
+  ReferrerScriptInfo info(WebURLRequest::kFetchCredentialsModePassword,
+                          "foobar", kNotParserInserted);
+  v8::Local<v8::PrimitiveArray> v8_info =
+      info.ToV8HostDefinedOptions(scope.GetIsolate());
+
+  ReferrerScriptInfo decoded =
+      ReferrerScriptInfo::FromV8HostDefinedOptions(scope.GetContext(), v8_info);
+  EXPECT_EQ(WebURLRequest::kFetchCredentialsModePassword,
+            decoded.CredentialsMode());
+  EXPECT_EQ("foobar", decoded.Nonce());
+  EXPECT_EQ(kNotParserInserted, decoded.ParserState());
+}
+
+}  // namespace blink