Adding MemConsumer android application.

 The MemConsumer application is a simple android application that will allocate
a configurable amount of memory and that can be used to test the system with a
known external memory pressure.

R=bulach@chromium.org, frankf@chromium.org
BUG=244975

Review URL: https://codereview.chromium.org/23976013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225191 0039d316-1c4b-4281-b951-d872f2087c98
[chromedriver] Rename chromedriver2 target names to remove '2'.

Some test targets are kept because infra needs to be updated.
BUG=none
R=craigdh@chromium.org

Review URL: https://codereview.chromium.org/24162008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225192 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 225192