Fix Linux shared build breakage due to undefined references.
Fix Linux shared build breakage due to undefined references.

This compiles an empty file so we can generate the libplugin target needed by
other targets. This whole file does compile (see r9934), but it doesn't link
because of undefined refs to files which aren't compiling yet (e.g.
npobject_proxy stuff). But we need some sources to build an empty lib,
otherwise scons fails to link in skia (when linking with no source files, the
-L flag is left off the linker command, so libs in the build directory can't be
found).

Review URL: http://codereview.chromium.org/27019


git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@10227 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser