Fix shared_library build break on Chrome OS caused by r128351.
Fix shared_library build break on Chrome OS caused by r128351.

BUG=111733
TEST=In the cros chroot, ran 'USE=component_build emerge-$BOARD chromeos-chrome'

Review URL: https://chromiumcodereview.appspot.com/9826041

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@128416 0039d316-1c4b-4281-b951-d872f2087c98

yitian134/chromium,adobe/chromium,yitian134/chromium,adobe/chromium,ropik/chromium,yitian134/chromium,yitian134/chromium,yitian134/chromium,ropik/chromium,ropik/chromium,adobe/chromium,gavinp/chromium,yitian134/chromium,ropik/chromium,gavinp/chromium,adobe/chromium,adobe/chromium,ropik/chromium,adobe/chromium,ropik/chromium,adobe/chromium,gavinp/chromium,ropik/chromium,gavinp/chromium,adobe/chromium,adobe/chromium,yitian134/chromium,gavinp/chromium,yitian134/chromium,ropik/chromium,gavinp/chromium,adobe/chromium,yitian134/chromium,gavinp/chromium,gavinp/chromium,gavinp/chromium,ropik/chromium,adobe/chromium,yitian134/chromium,gavinp/chromium