Add an AtExitManager to the ipc fuzzer's replay process.

This fixes an immediate failure with "Tried to RegisterCallback without an
AtExitManager" when running ipc_fuzzer_replay in debug builds.

R=inferno@chromium.org

Review URL: https://codereview.chromium.org/191293016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256104 0039d316-1c4b-4281-b951-d872f2087c98
Move LocalDiscoveryUIHandler to observing SigninManager

This change is part of the effort to eliminate Signin-related notifications.

BUG=345634

Review URL: https://codereview.chromium.org/189843010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256105 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 256105
Add option to avd.py script to launch an existing AVD.

The current avd.py script creates and launches multiple temporary AVD's. This CL
adds the option to launch an existing AVD. The advantage of launching an
existing AVD is that we can go on the bot into the src/android_emulator_sdk and
create different AVD's to use, allowing us to see what the setting of the AVD.
The current way creates AVD's that developers can not inspect without looking at
the scripts. Creating an AVD on a bot is like putting a device on the bot.

BUG=344622, 344622

Review URL: https://codereview.chromium.org/176943009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256107 0039d316-1c4b-4281-b951-d872f2087c98
Updating trunk VERSION from 1883.0 to 1884.0

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256108 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 256108