Disable key verification by default.

The production DMServer does not yet generate the correct signatures, so we
will stop verifying signatures by default. We will revert this CL once the
signature verification vs DMServer in the final format is fully working.

BUG=275291

Review URL: https://codereview.chromium.org/156723002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249685 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249685
[Android] Add ps_ext tool for tools-friendly cpu/mem/proc stats.

ps_ext is a simple ps-like tool, which generates a JSON dump containing
OS and processes stats. It is intended to be used by other tools, in
particular by the new memory_inspector (see related bug).

BUG=340294
R=pliard@chromium.org

Review URL: https://codereview.chromium.org/146803007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249686 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249686