Headless: make URLRequestDispatcher aware of navigations

headless/public/util/navigation_request.h

Index: headless/public/util/navigation_request.h
diff --git a/headless/public/util/navigation_request.h b/headless/public/util/navigation_request.h
new file mode 100644
index 0000000000000000000000000000000000000000..cd28f10dd93862278602d19d5e22811e732fd9f0
--- /dev/null
+++ b/headless/public/util/navigation_request.h
@@ -0,0 +1,31 @@
+// 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 HEADLESS_PUBLIC_UTIL_NAVIGATION_REQUEST_H_
+#define HEADLESS_PUBLIC_UTIL_NAVIGATION_REQUEST_H_
+
+#include "base/macros.h"
+
+namespace headless {
+
+// While the actual details of the navigation processing are left undefined,
+// it's anticipated implementations will use devtools Page.setControlNavigations
+// and Page.processNavigation commands.
+class NavigationRequest {
+ public:
+  NavigationRequest() {}
+  virtual ~NavigationRequest() {}
+
+  // Called on the IO thread to ask the implementation to start processing the
+  // navigation request. The NavigationRequest will be deleted immediately after
+  // The |done_callback| can be called from any thread.
+  virtual void StartProcessing(base::Closure done_callback) = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(NavigationRequest);
+};
+
+}  // namespace headless
+
+#endif  // HEADLESS_PUBLIC_UTIL_NAVIGATION_REQUEST_H_