PlzNavigate: support the WebRequest API

chrome/browser/renderer_host/chrome_navigation_ui_data.h

+// 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.
+
+#ifndef CHROME_BROWSER_RENDERER_HOST_CHROME_NAVIGATION_UI_DATA_H_
+#define CHROME_BROWSER_RENDERER_HOST_CHROME_NAVIGATION_UI_DATA_H_
+
+#include <memory>
+
+#include "base/macros.h"
+#include "content/public/browser/navigation_ui_data.h"
+#include "extensions/browser/extension_navigation_ui_data.h"
+
+namespace content {
+class NavigationHandle;
+}
+
+// PlzNavigate
+// Contains data that is passed from the UI thread to the IO thread at the
+// beginning of each navigation. The class is instantiated on the UI thread,
+// then a copy created using Clone is passed to the content::ResourceRequestInfo
+// on the IO thread.
+class ChromeNavigationUIData : public content::NavigationUIData {
+ public:
+  ChromeNavigationUIData();
+  explicit ChromeNavigationUIData(content::NavigationHandle* navigation_handle);
+  ~ChromeNavigationUIData() override;
+
+  // Creates a new ChromeNavigationUIData that is a deep copy of the original.
+  // Any changes to the original after the clone is created will not be
+  // reflected in the clone.  |extension_data_| is deep copied.
+  std::unique_ptr<content::NavigationUIData> Clone() const override;
+
+#if defined(ENABLE_EXTENSIONS)
+  void SetExtensionNavigationUIData(
+      std::unique_ptr<extensions::ExtensionNavigationUIData> extension_data);
+
+  extensions::ExtensionNavigationUIData* GetExtensionNavigationUIData() const {
+    return extension_data_.get();
+  }
+#endif
+
+ private:
+#if defined(ENABLE_EXTENSIONS)
+  // Manages the lifetime of optional ExtensionNavigationUIData information.
+  std::unique_ptr<extensions::ExtensionNavigationUIData> extension_data_;
+#endif
+
+  DISALLOW_COPY_AND_ASSIGN(ChromeNavigationUIData);
+};
+
+#endif  // CHROME_BROWSER_RENDERER_HOST_CHROME_NAVIGATION_UI_DATA_H_