Add WebView PlzNavigate related fixes to extensions_browsertests harness.

extensions/shell/browser/shell_navigation_ui_data.cc

+// Copyright 2016 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 "extensions/shell/browser/shell_navigation_ui_data.h"
+
+#include "base/memory/ptr_util.h"
+#include "content/public/browser/navigation_handle.h"
+
+namespace extensions {
+
+ShellNavigationUIData::ShellNavigationUIData() {}
+
+ShellNavigationUIData::ShellNavigationUIData(
+    content::NavigationHandle* navigation_handle) {
+  extension_data_ = base::MakeUnique<ExtensionNavigationUIData>(
+      navigation_handle, -1, -1);
+}
+
+ShellNavigationUIData::~ShellNavigationUIData() {}
+
+std::unique_ptr<content::NavigationUIData> ShellNavigationUIData::Clone()
+    const {
+  std::unique_ptr<ShellNavigationUIData> copy =
+      base::MakeUnique<ShellNavigationUIData>();
+
+  if (extension_data_)
+    copy->SetExtensionNavigationUIData(extension_data_->DeepCopy());
+
+  return std::move(copy);
+}
+
+void ShellNavigationUIData::SetExtensionNavigationUIData(
+    std::unique_ptr<ExtensionNavigationUIData> extension_data) {
+  extension_data_ = std::move(extension_data);
+}
+
+}  // namespace extensions