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This disabmiguates the case where a component load fails due to no internet,
versus a component load being blocked behind a continuing update.

Bug: 1010796
Change-Id: I9cf6956a86f5f342f7b1bea61666575212e65712
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1930279
Commit-Queue: Nicholas Verne <nverne@chromium.org>
Reviewed-by: Fergus Dall <sidereal@google.com>
Reviewed-by: David Roger <droger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#719447}