Always use the app icon as the taskbar icon for windowed streamlined hosted apps.

Hosted app windows currently use the current URL to determine the taskbar icon.
This CL makes hosted app windows always use the app icon which provides a
higher resolution icon than is currently provided and provides the window
with a better sense of identity since the icon doesn't change.

BUG=318607

Review URL: https://codereview.chromium.org/169443007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251749 0039d316-1c4b-4281-b951-d872f2087c98
Roll DEPS for libjpeg_turbo.

Includes a GYP tweak for MemorySanitizer builds. No other changes are included, and non-MSan builds should not be affected.

BUG=313751
R=glider@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/168903003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251750 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251751 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251751