Fix Mario (32-bit) build.
Fix Mario (32-bit) build.

Was using "%zu".  Worked on 64-bit, not on 32-bit.  Now casting to
(long long int) so I can use "%lld" on both platforms.

TBR=jamescook@chromium.org
BUG=none
TEST=built chrome_sandbox

Review URL: https://chromiumcodereview.appspot.com/10353020

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@135211 0039d316-1c4b-4281-b951-d872f2087c98

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