Add the pointer type of pen to the synthetic WebMousEvent

content/browser/renderer_host/input/synthetic_pen_driver.h

Index: content/browser/renderer_host/input/synthetic_pen_driver.h
diff --git a/content/browser/renderer_host/input/synthetic_pen_driver.h b/content/browser/renderer_host/input/synthetic_pen_driver.h
new file mode 100644
index 0000000000000000000000000000000000000000..d6ece9f0532afad0bfe9a1afc85c81e107327e2d
--- /dev/null
+++ b/content/browser/renderer_host/input/synthetic_pen_driver.h
@@ -0,0 +1,25 @@
+// 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 CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_PEN_DRIVER_H_
+#define CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_PEN_DRIVER_H_
+
+#include "base/macros.h"
+#include "content/browser/renderer_host/input/synthetic_mouse_driver.h"
+#include "content/common/content_export.h"
+
+namespace content {
+
+class CONTENT_EXPORT SyntheticPenDriver : public SyntheticMouseDriver {
+ public:
+  SyntheticPenDriver();
+  ~SyntheticPenDriver() override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(SyntheticPenDriver);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_SYNTHETIC_PEN_DRIVER_H_