1. Enables the Safe Browsing download reporting feature on all channels
2. For DOWNLOAD_HOST, moves the reporting button into the dropdown (label: "Report to Google")

BUG=305387,169557

Review URL: https://codereview.chromium.org/54123002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232626 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 232626
Refactor parsing of /proc files into separate functions

This refactors out the non-trivial parsing functions from
GetSystemMemoryInfo in preparation for fixing them and adding unit-tests.

BUG=309930
TEST=about:memory still works
R=brettw@chromium.org, davemoore@chromium.org

Review URL: https://codereview.chromium.org/32253007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232627 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 232627