Automated Commit: Committing new LKGM version 4856.0.0 for chromeos.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230357 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230357
Introduce ShellBreakpadClient and install it.

We're not yet initializing breakpad, as this is not yet posible on all
supported platforms.

Also change some defaults of BreakpadClient so I have to override fewer
methods.

BUG=247431
R=rsesek@chromium.org

Review URL: https://codereview.chromium.org/27647002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230358 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230358