Log Message:
webkit-gtk: Update to 2.26.2

Changes:
2.26.2
======
  - Improve performance of querying system fallback fonts.
  - Don't use prgname in dbus-proxy socket path.
  - Fix thread-safety issues in image decoders.
  - Fix the build with WebDriver disabled.
  - Disable accelerated compositing when we fail to initialize the EGL
    dispaly under Wayland.
  - Fill the objects category in emoji picker.
  - Fix several crashes and rendering issues.