GTK: Fix some event coordinate logic

chrome/browser/gtk/browser_window_gtk.cc

Index: chrome/browser/gtk/browser_window_gtk.cc
diff --git a/chrome/browser/gtk/browser_window_gtk.cc b/chrome/browser/gtk/browser_window_gtk.cc
index 52f70e3a77154fec0e19080af1afb1973bb8bc33..134913c87003bf9a8c953b5647a78568b6a7fa99 100644
--- a/chrome/browser/gtk/browser_window_gtk.cc
+++ b/chrome/browser/gtk/browser_window_gtk.cc
@@ -1912,8 +1912,8 @@ gboolean BrowserWindowGtk::OnButtonPressEvent(GtkWidget* widget,
                      NULL);
 
         guint32 click_time = event->time - last_click_time;
-        int click_move_x = static_cast<int>(event->x - last_click_position.x());
-        int click_move_y = static_cast<int>(event->y - last_click_position.y());
+        int click_move_x = abs(event->x - last_click_position.x());
+        int click_move_y = abs(event->y - last_click_position.y());
 
         if (click_time > static_cast<guint32>(double_click_time) ||
             click_move_x > double_click_distance ||