Don't lookup touchscreen info for XIMasterPointer.

ui/events/x/touch_factory_x11.cc

 // Copyright (c) 2012 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 "ui/events/x/touch_factory_x11.h"
 
 #include <X11/Xatom.h>
 #include <X11/cursorfont.h>
 #include <X11/extensions/XInput.h>
 #include <X11/extensions/XInput2.h>
@@ skipping 112 matching lines @@
   XIDeviceList xi_dev_list =
       DeviceListCacheX::GetInstance()->GetXI2DeviceList(display);
   for (int i = 0; i < xi_dev_list.count; i++) {
     XIDeviceInfo* devinfo = xi_dev_list.devices + i;
     if (devinfo->use == XIFloatingSlave || devinfo->use == XIMasterPointer) {
 #if defined(USE_XI2_MT)
       for (int k = 0; k < devinfo->num_classes; ++k) {
         XIAnyClassInfo* xiclassinfo = devinfo->classes[k];
         if (xiclassinfo->type == XITouchClass) {
           XITouchClassInfo* tci =
-              reinterpret_cast<XITouchClassInfo *>(xiclassinfo);
+              reinterpret_cast<XITouchClassInfo*>(xiclassinfo);
           // Only care direct touch device (such as touch screen) right now
           if (tci->mode == XIDirectTouch) {
-            CacheTouchscreenIds(display, devinfo->deviceid);
             touch_device_lookup_[devinfo->deviceid] = true;
             touch_device_list_[devinfo->deviceid] = true;
             touch_device_available_ = true;
             if (tci->num_touches > 0 && tci->num_touches > max_touch_points_)
               max_touch_points_ = tci->num_touches;
           }
         }
       }
 #endif
       pointer_device_lookup_[devinfo->deviceid] = true;
     }
+
+#if defined(USE_XI2_MT)
+    if (devinfo->use == XIFloatingSlave || devinfo->use == XISlavePointer) {
+      for (int k = 0; k < devinfo->num_classes; ++k) {
+        XIAnyClassInfo* xiclassinfo = devinfo->classes[k];
+        if (xiclassinfo->type == XITouchClass) {
+          XITouchClassInfo* tci =
+              reinterpret_cast<XITouchClassInfo*>(xiclassinfo);
+          // Only care direct touch device (such as touch screen) right now
+          if (tci->mode == XIDirectTouch)
+            CacheTouchscreenIds(display, devinfo->deviceid);
+        }
+      }
+    }
+#endif
   }
 }
 
 bool TouchFactory::ShouldProcessXI2Event(XEvent* xev) {
   DCHECK_EQ(GenericEvent, xev->type);
   XIEvent* event = static_cast<XIEvent*>(xev->xcookie.data);
   XIDeviceEvent* xiev = reinterpret_cast<XIDeviceEvent*>(event);
 
 #if defined(USE_XI2_MT)
   if (event->evtype == XI_TouchBegin ||
@@ skipping 146 matching lines @@
       if (ptr[0] || ptr[1])
         touchscreen_ids_.insert(std::make_pair(ptr[0], ptr[1]));
     }
     XFree(prop_return);
   }
 
   XCloseDevice(display, device);
 }
 
 }  // namespace ui