aura: Fix a crash related to nested event-dispatch.

If events are being dispatched from a nested message-loop, and the target of the
outer loop is hidden or moved to another dispatcher during dispatching events in
the inner loop, then reset the target for the outer loop.

BUG=347012
R=sky@chromium.org

Previously landed on r254150 but reverted in r254183 because it broke clang builds.

Review URL: https://codereview.chromium.org/180973007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@254312 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 254312
Fix build issues in chrome/ for Android x64

BUG=346626

Review URL: https://codereview.chromium.org/179873015

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@254313 0039d316-1c4b-4281-b951-d872f2087c98
Fix race condition in uploading feedback reports.
It is possible that if the browser starts and shuts down really quickly, we may end up with a race where the context passed to LoadReports has been nullified. We can completely avoid this race by simply passing in the user directory to LoadReportsAndQueue since the method doesn't really need the context for anything else.

R=zork@chromium.org
BUG=345805

Review URL: https://codereview.chromium.org/185003005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@254314 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 254314
Fixed A4_EXTRA and A5_EXTRA paper sizes.

Review URL: https://codereview.chromium.org/183743008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@254315 0039d316-1c4b-4281-b951-d872f2087c98
Remove a bunch of unused network flags.

--enable-sdch (renamed to --enable-sdch-over-https)
--enable-spdy2
--max-spdy-concurrent-streams (kept the ability in the networking library to expose this for configuration purposes, but chromium will not configure it)
--enable-ip-pooling
--disable-ip-pooling

BUG=344673,303957,344684,344698,344793

Review URL: https://codereview.chromium.org/169053004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@254316 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 254316