Allow synthesized WM_MOUSEMOVE and WM_MOUSELEAVE messages for touch based input through.

ui/views/win/hwnd_message_handler.cc

Index: ui/views/win/hwnd_message_handler.cc
===================================================================
--- ui/views/win/hwnd_message_handler.cc	(revision 240282)
+++ ui/views/win/hwnd_message_handler.cc	(working copy)
@@ -1512,14 +1512,17 @@
                                          WPARAM w_param,
                                          LPARAM l_param) {
 #if defined(USE_AURA)
-  if (!touch_ids_.empty())
+  if (!touch_ids_.empty() && message != WM_MOUSEMOVE &&
+      message != WM_MOUSELEAVE) {
     return 0;
+  }
   // We handle touch events on Windows Aura. Windows generates synthesized
   // mouse messages in response to touch which we should ignore. However touch
   // messages are only received for the client area. We need to ignore the
   // synthesized mouse messages for all points in the client area and places
   // which return HTNOWHERE.
-  if (ui::IsMouseEventFromTouch(message)) {
+  if (message != WM_MOUSEMOVE && message != WM_MOUSELEAVE &&
+      ui::IsMouseEventFromTouch(message)) {
     LPARAM l_param_ht = l_param;
     // For mouse events (except wheel events), location is in window coordinates
     // and should be converted to screen coordinates for WM_NCHITTEST.