Revert 115350 - causes MRUCacheTest.KeyReplacement to crash
Revert 115350 - causes MRUCacheTest.KeyReplacement to crash

Coverity fixlet: fix PASS_BY_VALUE

R=jar@chromium.org
CID=102145
BUG=
TEST=


Review URL: http://codereview.chromium.org/9006030

TBR=scr@chromium.org
Review URL: http://codereview.chromium.org/8949045

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@115365 0039d316-1c4b-4281-b951-d872f2087c98

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