GitLab

The reason for the flaky Mojo connection of ContentSettingsManager
was that |content_settings_manager_| tried to connect to its
receiver via BrowserInterfaceBroker in ContentSettingsAgentImpl
ctor once, but BrowserInterfaceBroker could be reset before
|content_settings_manager_| was connected.
This CL ensures its connection to retry in DidCommitProvisionalLoad
if it is not connected.

Bug: 936482
Change-Id: I29db1ea13e2fa4de49f431d07ac249ed6e318d1d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1897576Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Oksana Zhuravlova <oksamyt@chromium.org>
Commit-Queue: Miyoung Shin <myid.shin@igalia.com>
Cr-Commit-Position: refs/heads/master@{#713626}