Coverity: Pass parameters by reference.

CID=12947,13008,13087,13144,13280,13479,13480,13574,13575,13576,13580,13594,
13595,14186,14351
BUG=none
TEST=none

R=csilv@chromium.org

Review URL: http://codereview.chromium.org/6733043

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@79595 0039d316-1c4b-4281-b951-d872f2087c98
19 files changed