Fix GCC4.7 compilation warning introduced in r10400
Fix GCC4.7 compilation warning introduced in r10400

Add some usages for string1 and string2 to avoid "assigned
but not used" warning.

Review URL: http://codereview.chromium.org/9163003
Patch from Yury Semikhatsky <yurys@chromium.org>.

git-svn-id: b158db1e4b4ab85d4c9e510fdef4b1e8c614b15b@10405 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh