Introduce WM_POINTER to Handle pointer events with pen type

content/browser/renderer_host/legacy_render_widget_host_win.cc

 // Copyright (c) 2014 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 "content/browser/renderer_host/legacy_render_widget_host_win.h"
 
 #include <memory>
 
 #include "base/command_line.h"
 #include "base/win/win_util.h"
@@ skipping 294 matching lines @@
   // current cursor location. We check for this property in our
   // WM_MOUSEACTIVATE handler and don't activate the window if the property is
   // set.
   if (::GetProp(hwnd(), ui::kIgnoreTouchMouseActivateForWindow)) {
     ::RemoveProp(hwnd(), ui::kIgnoreTouchMouseActivateForWindow);
     return MA_NOACTIVATE;
   }
   return MA_ACTIVATE;
 }
 
+LRESULT LegacyRenderWidgetHostHWND::OnPointer(UINT message,
+                                              WPARAM w_param,
+                                              LPARAM l_param) {
+  LRESULT ret = 0;
+  if (GetWindowEventTarget(GetParent())) {
+    bool msg_handled = false;
+    ret = GetWindowEventTarget(GetParent())
+              ->HandlePointerMessage(message, w_param, l_param, &msg_handled);
+    SetMsgHandled(msg_handled);
+  }
+  return ret;
+}
+
 LRESULT LegacyRenderWidgetHostHWND::OnTouch(UINT message,
                                             WPARAM w_param,
                                             LPARAM l_param) {
   LRESULT ret = 0;
   if (GetWindowEventTarget(GetParent())) {
     bool msg_handled = false;
     ret = GetWindowEventTarget(GetParent())->HandleTouchMessage(
         message, w_param, l_param, &msg_handled);
     SetMsgHandled(msg_handled);
   }
@@ skipping 83 matching lines @@
       direct_manipulation_helper_->Activate(hwnd());
     } else if (window_pos->flags & SWP_HIDEWINDOW) {
       direct_manipulation_helper_->Deactivate(hwnd());
     }
   }
   SetMsgHandled(FALSE);
   return 0;
 }
 
 }  // namespace content