GitLab

If establishing a gpu channel fails, then it could be because access to
gpu is not allowed, in which case the client should use software fallback.
If, on the other hand, the failure happens because the gpu process was
killed, or the gpu process crashed, then the attempt to establish the
channel should be retried. But instead of retrying in the clients, retry
in the host, which has better information to know whether a retry attempt
may be successful or not.

Remove the retry logic in the renderer (in RenderWidgetCompositor), since
the host (GpuClient) will be taking care of that.

BUG=609316

Change-Id: Ibcc1d5e79f354ccb282bad2321fca26d1c06402c
Reviewed-on: https://chromium-review.googlesource.com/571490Reviewed-by: Antoine Labour <piman@chromium.org>
Commit-Queue: Sadrul Chowdhury <sadrul@chromium.org>
Cr-Commit-Position: refs/heads/master@{#486835}