x11: vendor/product ids of devices are no longer used.

The usb-style vendor-id/product-id for input devices are no longer
used. So remove them.

Bug: None
Change-Id: I72b8c136799f944281849b461140beb636ef75c9
Reviewed-on: https://chromium-review.googlesource.com/967732Reviewed-by: kylechar <kylechar@chromium.org>
Commit-Queue: Sadrul Chowdhury <sadrul@chromium.org>
Cr-Commit-Position: refs/heads/master@{#544121}

ui/events/platform/x11/x11_hotplug_event_handler.cc

@@ -108,13 +108,9 @@ struct TouchClassInfo {
 struct DeviceInfo {
   DeviceInfo(const XIDeviceInfo& device,
              DeviceType type,
-             const base::FilePath& path,
-             uint16_t vendor,
-             uint16_t product)
+             const base::FilePath& path)
       : id(device.deviceid),
         name(device.name),
-        vendor_id(vendor),
-        product_id(product),
         use(device.use),
         type(type),
         path(path) {
@@ -143,10 +139,6 @@ struct DeviceInfo {
   // Internal device name.
   std::string name;
 
-  // USB-style device identifiers.
-  uint16_t vendor_id;
-  uint16_t product_id;
-
   // Device type (ie: XIMasterPointer)
   int use;
 
@@ -433,31 +425,8 @@ void X11HotplugEventHandler::OnHotplugEvent() {
         (device.deviceid >= 0 && device.deviceid < kMaxDeviceNum)
             ? device_types[device.deviceid]
             : DEVICE_TYPE_OTHER;
-
-    // Obtain the USB-style vendor and product identifiers.
-    // (On Linux, XI2 makes this available for all evdev devices.
-    uint32_t* product_info;
-    Atom type;
-    int format_return;
-    unsigned long num_items_return;
-    unsigned long bytes_after_return;
-    uint16_t vendor = 0;
-    uint16_t product = 0;
-    if (XIGetProperty(gfx::GetXDisplay(), device.deviceid,
-                      gfx::GetAtom(XI_PROP_PRODUCT_ID), 0, 2, 0, XA_INTEGER,
-                      &type, &format_return, &num_items_return,
-                      &bytes_after_return,
-                      reinterpret_cast<unsigned char**>(&product_info)) == 0 &&
-        product_info) {
-      if (num_items_return == 2) {
-        vendor = product_info[0];
-        product = product_info[1];
-      }
-      XFree(product_info);
-    }
-
-    device_infos.push_back(DeviceInfo(
-        device, device_type, GetDevicePath(display, device), vendor, product));
+    device_infos.push_back(
+        DeviceInfo(device, device_type, GetDevicePath(display, device)));
   }
 
   // X11 is not thread safe, so first get all the required state.