linux: build a fake libxul and libxpcom

webkit/tools/libxul_hack/libxul_hack.cc

Index: webkit/tools/libxul_hack/libxul_hack.cc
diff --git a/webkit/tools/libxul_hack/libxul_hack.cc b/webkit/tools/libxul_hack/libxul_hack.cc
new file mode 100644
index 0000000000000000000000000000000000000000..600d75a287eec09cb64cdb2b86e4c844430f9dd1
--- /dev/null
+++ b/webkit/tools/libxul_hack/libxul_hack.cc
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+// Copyright (c) 2009 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.
+
+// Some plugins on older Linuxes depend on libxul.so and libxpcom.so
+// despite not actually requiring any symbols from them.  So we build
+// a fake libxul.so and libxpcom.so and include them in our library
+// path.
+//
+// This source file is therefore empty, and used to build those
+// libraries.
+//
+// This may sound like a terrible hack, but after I thought of it I
+// noticed that nspluginwrapper does the same thing.