Add Chromium-only Blender WebEngine parity work

blender-5.2.0/build_files/cmake/Modules/FindLibEpoxy.cmake

@@ -0,0 +1,48 @@
+# SPDX-FileCopyrightText: 2022 Blender Authors
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
+# This module defines
+#  LIBEPOXY_INCLUDE_DIRS, where to find epoxy/gl.h
+#  LIBEPOXY_LIBRARIES, where to find the epoxy library.
+#  LIBEPOXY_ROOT_DIR, The base directory to search for libepoxy.
+#                     This can also be an environment variable.
+#  LIBEPOXY_FOUND, If false, do not try to use libepoxy.
+
+if(NOT EPOXY_ROOT_DIR AND NOT $ENV{EPOXY_ROOT_DIR} STREQUAL "")
+  set(EPOXY_ROOT_DIR $ENV{EPOXY_ROOT_DIR})
+endif()
+
+find_path(LIBEPOXY_INCLUDE_DIR
+  NAMES
+    epoxy/gl.h
+  HINTS
+    ${EPOXY_ROOT_DIR}
+  PATH_SUFFIXES
+    include
+)
+
+find_library(LIBEPOXY_LIBRARY
+  NAMES
+    epoxy
+  HINTS
+    ${EPOXY_ROOT_DIR}
+  PATH_SUFFIXES
+    lib64 lib
+)
+
+# handle the QUIETLY and REQUIRED arguments and set LIBEPOXY_FOUND to TRUE if
+# all listed variables are TRUE
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(LibEpoxy DEFAULT_MSG
+    LIBEPOXY_LIBRARY LIBEPOXY_INCLUDE_DIR)
+
+if(LIBEPOXY_FOUND)
+  set(LIBEPOXY_INCLUDE_DIRS ${LIBEPOXY_INCLUDE_DIR})
+  set(LIBEPOXY_LIBRARIES ${LIBEPOXY_LIBRARY})
+endif()
+
+mark_as_advanced(
+  LIBEPOXY_INCLUDE_DIR
+  LIBEPOXY_LIBRARY
+)