content: Use min instead of mean for cc_messages_perftests.

Min has less noise so prefer it for perf tests.

R=piman
BUG=307480

Review URL: https://codereview.chromium.org/45843002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@231256 0039d316-1c4b-4281-b951-d872f2087c98
end2end_unittest fix for official Win64 compile.

Fixes compile failure due to warning treated as error:
end2end_unittest.cc(274) : warning C4267: 'initializing' : conversion from 'size_t' to 'int', possible loss of data

Review URL: https://codereview.chromium.org/46203002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@231257 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 231256
SVN changes up to revision 231257