Fix Compile error with "-Duse_aura=1".
Fix Compile error with "-Duse_aura=1".

BUG=114778
TEST=Compile chromium with "-Duse_aura=1"


Review URL: http://codereview.chromium.org/9423002

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@122699 0039d316-1c4b-4281-b951-d872f2087c98

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