Media Remoting: Get permission when requested to start.

Get permission to start remoting when harmony cast dialog is enabled.

Bug: 849020
Change-Id: I98e306c7ffaa6f53dc825a418f2c0b48ea7a9ee2
Reviewed-on: https://chromium-review.googlesource.com/1139173
Reviewed-by: Xiaohan Wang <xhwang@chromium.org>
Reviewed-by: Yuri Wiitala <miu@chromium.org>
Reviewed-by: Takumi Fujimoto <takumif@chromium.org>
Commit-Queue: Xiangjun Zhang <xjz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#579226}
5 files changed