Install the chrome event log provider together with the browser.

The dll will always be present but only registered when running
a system install because we need access to the LOCAL_MACHINE hive.

BUG=642115
TEST=setup_util_unittest,mini_installer,manual

Review-Url: https://codereview.chromium.org/2507753002
Cr-Commit-Position: refs/heads/master@{#439788}
10 files changed