Update mojo sdk to rev
e7270700d671fa8e458b4d8c9e47f7bcfb65da0b
This cherry-picks two mojo changes past
e7270700, namely:
mojo.gni fix: https://chromium.googlesource.com/external/mojo/+/
c88997f930c71b7e6748948263c4c01d7e10bc75
generated C++ interface definition fix: https://chromium.googlesource.com/external/mojo/+/
6f41dc4d98fc17a447cd48837cc8ff7edf8df465
Finally this CL also adds a default TaskTracker to the
chromium mojo environment.
BUG=
TBR=ben@chromium.org
Review URL: https://codereview.chromium.org/
1101303002
Cr-Commit-Position: refs/heads/master@{#326890}