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Rather than relying on an empty origin ID to indicate failure to
initialize, return a bool parameter that specifies it properly.
This will allow future changes that support pre-provisioned origin
IDs to handle the case where an empty origin ID is used temporarily.

BUG=917527
TEST=components_unittests pass

Change-Id: I1ee06f60af49ffa08dc16ed0d5def5fc0be7351e
Reviewed-on: https://chromium-review.googlesource.com/c/1453100
Commit-Queue: John Rummell <jrummell@chromium.org>
Reviewed-by: Yuchen Liu <yucliu@chromium.org>
Reviewed-by: Xiaohan Wang <xhwang@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#630088}