implement Sec-GPC header and globalPrivacyControl JS API

browser/net/BUILD.gn

@@ -34,6 +34,8 @@ source_set("net") {
     "brave_stp_util.h",
     "brave_system_request_handler.cc",
     "brave_system_request_handler.h",
+    "global_privacy_control_network_delegate_helper.cc",
+    "global_privacy_control_network_delegate_helper.h",
     "resource_context_data.cc",
     "resource_context_data.h",
     "url_context.cc",

browser/net/brave_request_handler.cc

@@ -15,6 +15,7 @@
 #include "brave/browser/net/brave_httpse_network_delegate_helper.h"
 #include "brave/browser/net/brave_site_hacks_network_delegate_helper.h"
 #include "brave/browser/net/brave_stp_util.h"
+#include "brave/browser/net/global_privacy_control_network_delegate_helper.h"
 #include "brave/browser/translate/buildflags/buildflags.h"
 #include "brave/common/pref_names.h"
 #include "brave/components/brave_referrals/buildflags/buildflags.h"
@@ -100,6 +101,10 @@ void BraveRequestHandler::SetupCallbacks() {
       base::Bind(brave::OnBeforeStartTransaction_SiteHacksWork);
   before_start_transaction_callbacks_.push_back(start_transaction_callback);
 
+  start_transaction_callback =
+      base::Bind(brave::OnBeforeStartTransaction_GlobalPrivacyControlWork);
+  before_start_transaction_callbacks_.push_back(start_transaction_callback);
+
 #if BUILDFLAG(ENABLE_BRAVE_REFERRALS)
   start_transaction_callback =
       base::Bind(brave::OnBeforeStartTransaction_ReferralsWork);

browser/net/global_privacy_control_network_delegate_helper.cc

@@ -0,0 +1,24 @@
+/* Copyright (c) 2020 The Brave Authors. All rights reserved.
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "brave/browser/net/global_privacy_control_network_delegate_helper.h"
+
+#include <memory>
+
+#include "brave/common/network_constants.h"
+#include "net/base/net_errors.h"
+#include "net/http/http_request_headers.h"
+
+namespace brave {
+
+int OnBeforeStartTransaction_GlobalPrivacyControlWork(
+    net::HttpRequestHeaders* headers,
+    const ResponseCallback& next_callback,
+    std::shared_ptr<BraveRequestInfo> ctx) {
+  headers->SetHeader(kSecGpcHeader, "1");
+  return net::OK;
+}
+
+}  // namespace brave

browser/net/global_privacy_control_network_delegate_helper.h

@@ -0,0 +1,22 @@
+/* Copyright (c) 2020 The Brave Authors. All rights reserved.
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef BRAVE_BROWSER_NET_GLOBAL_PRIVACY_CONTROL_NETWORK_DELEGATE_HELPER_H_
+#define BRAVE_BROWSER_NET_GLOBAL_PRIVACY_CONTROL_NETWORK_DELEGATE_HELPER_H_
+
+#include <memory>
+
+#include "brave/browser/net/url_context.h"
+
+namespace brave {
+
+int OnBeforeStartTransaction_GlobalPrivacyControlWork(
+    net::HttpRequestHeaders* headers,
+    const ResponseCallback& next_callback,
+    std::shared_ptr<BraveRequestInfo> ctx);
+
+}  // namespace brave
+
+#endif  // BRAVE_BROWSER_NET_GLOBAL_PRIVACY_CONTROL_NETWORK_DELEGATE_HELPER_H_

common/network_constants.cc

@@ -54,3 +54,5 @@ const char kBraveServicesKeyHeader[] = "BraveServiceKey";
 
 const char kBittorrentMimeType[] = "application/x-bittorrent";
 const char kOctetStreamMimeType[] = "application/octet-stream";
+
+const char kSecGpcHeader[] = "Sec-GPC";

common/network_constants.h

@@ -41,4 +41,6 @@ extern const char kBraveServicesKeyHeader[];
 
 extern const char kBittorrentMimeType[];
 extern const char kOctetStreamMimeType[];
+
+extern const char kSecGpcHeader[];
 #endif  // BRAVE_COMMON_NETWORK_CONSTANTS_H_

third_party/blink/renderer/includes.gni

@@ -15,9 +15,13 @@ brave_blink_renderer_modules_visibility = [
 ]
 
 brave_blink_sub_modules = [
-  "//brave/third_party/blink/renderer/modules/brave"
+  "//brave/third_party/blink/renderer/modules/brave",
+  "//brave/third_party/blink/renderer/modules/global_privacy_control"
 ]
 
 # common includes which can help minimize patches for
 # src/third_party/blink/renderer/modules/modules_idl_files.gni
-brave_idl_imports = [ "//brave/third_party/blink/renderer/modules/brave/idls.gni" ]
+brave_idl_imports = [
+  "//brave/third_party/blink/renderer/modules/brave/idls.gni",
+  "//brave/third_party/blink/renderer/modules/global_privacy_control/idls.gni"
+]

third_party/blink/renderer/modules/global_privacy_control/BUILD.gn

@@ -0,0 +1,13 @@
+# Copyright (c) 2020 The Brave Authors. All rights reserved.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this file,
+# You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import("//third_party/blink/renderer/modules/modules.gni")
+
+blink_modules_sources("global_privacy_control") {
+  sources = [
+    "navigator_global_privacy_control.cc",
+    "navigator_global_privacy_control.h",
+  ]
+}

third_party/blink/renderer/modules/global_privacy_control/idls.gni

@@ -0,0 +1,6 @@
+# Copyright (c) 2020 The Brave Authors. All rights reserved.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this file,
+# You can obtain one at http://mozilla.org/MPL/2.0/.
+
+modules_dependency_idl_files = [ "navigator_global_privacy_control.idl" ]

third_party/blink/renderer/modules/global_privacy_control/navigator_global_privacy_control.cc

@@ -0,0 +1,40 @@
+/* Copyright (c) 2020 The Brave Authors. All rights reserved.
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "brave/third_party/blink/renderer/modules/global_privacy_control/navigator_global_privacy_control.h"
+
+#include "third_party/blink/renderer/core/frame/navigator.h"
+
+namespace blink {
+
+NavigatorGlobalPrivacyControl::
+  NavigatorGlobalPrivacyControl(Navigator& navigator) // NOLINT
+    : Supplement<Navigator>(navigator) {}
+
+// static
+const char NavigatorGlobalPrivacyControl::kSupplementName[] =
+    "NavigatorGlobalPrivacyControl";
+
+NavigatorGlobalPrivacyControl&
+  NavigatorGlobalPrivacyControl::From(Navigator& navigator) {
+  NavigatorGlobalPrivacyControl* supplement =
+      Supplement<Navigator>::From<NavigatorGlobalPrivacyControl>(navigator);
+  if (!supplement) {
+    supplement = MakeGarbageCollected<NavigatorGlobalPrivacyControl>(navigator);
+    ProvideTo(navigator, supplement);
+  }
+  return *supplement;
+}
+
+bool NavigatorGlobalPrivacyControl::
+  globalPrivacyControl(blink::Navigator& navigator) { // NOLINT
+  return true;
+}
+
+void NavigatorGlobalPrivacyControl::Trace(blink::Visitor* visitor) const {
+  Supplement<Navigator>::Trace(visitor);
+}
+
+}  // namespace blink

third_party/blink/renderer/modules/global_privacy_control/navigator_global_privacy_control.h

@@ -0,0 +1,39 @@
+// Copyright (c) 2020 The Brave Authors. All rights reserved.
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// you can obtain one at http://mozilla.org/MPL/2.0/.
+
+#ifndef BRAVE_THIRD_PARTY_BLINK_RENDERER_MODULES_GLOBAL_PRIVACY_CONTROL_NAVIGATOR_GLOBAL_PRIVACY_CONTROL_H_
+#define BRAVE_THIRD_PARTY_BLINK_RENDERER_MODULES_GLOBAL_PRIVACY_CONTROL_NAVIGATOR_GLOBAL_PRIVACY_CONTROL_H_
+
+#include "third_party/blink/renderer/core/frame/navigator.h"
+#include "third_party/blink/renderer/platform/bindings/name_client.h"
+#include "third_party/blink/renderer/platform/heap/handle.h"
+#include "third_party/blink/renderer/platform/supplementable.h"
+
+namespace blink {
+
+class Navigator;
+
+class NavigatorGlobalPrivacyControl final
+    : public GarbageCollected<NavigatorGlobalPrivacyControl>,
+      public Supplement<Navigator>,
+      public NameClient {
+
+ public:
+  static const char kSupplementName[];
+
+  static NavigatorGlobalPrivacyControl& From(Navigator&);
+  static bool globalPrivacyControl(blink::Navigator&);
+
+  explicit NavigatorGlobalPrivacyControl(Navigator&);
+
+  void Trace(blink::Visitor*) const override;
+  const char* NameInHeapSnapshot() const override {
+    return "NavigatorGlobalPrivacyControl";
+  }
+};
+
+}  // namespace blink
+
+#endif  // BRAVE_THIRD_PARTY_BLINK_RENDERER_MODULES_GLOBAL_PRIVACY_CONTROL_NAVIGATOR_GLOBAL_PRIVACY_CONTROL_H_

third_party/blink/renderer/modules/global_privacy_control/navigator_global_privacy_control.idl

@@ -0,0 +1,9 @@
+/* Copyright (c) 2020 The Brave Authors. All rights reserved.
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+[
+    ImplementedAs=NavigatorGlobalPrivacyControl
+] partial interface Navigator {
+    readonly attribute boolean globalPrivacyControl;
+};