Introduce WM_POINTER to Handle pointer events with pen type

content/browser/renderer_host/legacy_render_widget_host_win.h

Index: content/browser/renderer_host/legacy_render_widget_host_win.h
diff --git a/content/browser/renderer_host/legacy_render_widget_host_win.h b/content/browser/renderer_host/legacy_render_widget_host_win.h
index ab2d635e55df4bf4ff7a4ed4140f8a59a28a9bf0..32d387540589b83e9e43894982add95ca361474e 100644
--- a/content/browser/renderer_host/legacy_render_widget_host_win.h
+++ b/content/browser/renderer_host/legacy_render_widget_host_win.h
@@ -83,6 +83,11 @@ class CONTENT_EXPORT LegacyRenderWidgetHostHWND
     MESSAGE_HANDLER_EX(WM_MOUSEACTIVATE, OnMouseActivate)
     MESSAGE_HANDLER_EX(WM_SETCURSOR, OnSetCursor)
     MESSAGE_HANDLER_EX(WM_TOUCH, OnTouch)
+    MESSAGE_HANDLER_EX(WM_POINTERDOWN, OnPointer)
+    MESSAGE_HANDLER_EX(WM_POINTERUPDATE, OnPointer)
+    MESSAGE_HANDLER_EX(WM_POINTERUP, OnPointer)
+    MESSAGE_HANDLER_EX(WM_POINTERENTER, OnPointer)
+    MESSAGE_HANDLER_EX(WM_POINTERLEAVE, OnPointer)
     MESSAGE_HANDLER_EX(WM_HSCROLL, OnScroll)
     MESSAGE_HANDLER_EX(WM_VSCROLL, OnScroll)
     MESSAGE_HANDLER_EX(WM_NCHITTEST, OnNCHitTest)
@@ -135,6 +140,7 @@ class CONTENT_EXPORT LegacyRenderWidgetHostHWND
   LRESULT OnMouseRange(UINT message, WPARAM w_param, LPARAM l_param,
                        BOOL& handled);
   LRESULT OnMouseActivate(UINT message, WPARAM w_param, LPARAM l_param);
+  LRESULT OnPointer(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnTouch(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnScroll(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnNCHitTest(UINT message, WPARAM w_param, LPARAM l_param);