Coverity: Pass parameters by reference.

CID=6820,8735,11066,11067,11070,11071,11072,11073,11215,11216,11217,11927,12403
BUG=none
TEST=none

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Review URL: http://codereview.chromium.org/6730040

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@79602 0039d316-1c4b-4281-b951-d872f2087c98
16 files changed