Linux Aura: Hook up ctrl+w to the task manager.

BUG=318507
TEST=Open the task manager, pressing ctrl+w should close it.

Review URL: https://codereview.chromium.org/108953007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241257 0039d316-1c4b-4281-b951-d872f2087c98
android: Add download URL for API 19 x86 system images.

Otherwise, running build/android/install_emulator_deps.py fails with

  ... [python stack trace] ...
  Exception: ERROR: no URL known for x86 image for android-19

BUG=NONE
R=yfriedman@chromium.org,navabi@chromium.org,raphael.kubo.da.costa@chromium.org,mariakhomenko@chromium.org

Review URL: https://codereview.chromium.org/111333003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241258 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 241258
Fixed missing parameter in muting test.

BUG=325164

Review URL: https://codereview.chromium.org/108313009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241259 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 241259