Reenable disabled test.

BUG=336343
TBR=glider@chromium.org
NOTRY=true

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=246753

Review URL: https://codereview.chromium.org/146043006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246875 0039d316-1c4b-4281-b951-d872f2087c98
Deal with possibly NULL render_view_message_source_ if IPC messages re-ordered.

This is easily hit under the IPC fuzzer, and is easy to fix.  This will allow
the fuzzer to get further along.

BUG=337583

Review URL: https://codereview.chromium.org/146053002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246876 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246875
Define webpagereplay paths relative to 'src' rather than its parent dir.

Isolates, when run, don't reconstruct a 'src' directory -- they
reconstruct directories that would otherwise be contained in 'src'.
This change makes webpagereplay work within isolates again.

BUG=321878
TEST=built telemetry_gpu_test_run target; ran maps test. This will soon be done on the GPU bots.

Review URL: https://codereview.chromium.org/146053004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246877 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246877