Fix race with google variation ID registration

Fix race with google variation ID registration

If ExternalDataUseObserverBridge::ShouldRegisterAsDataUseObserver() is
called before ExternalDataUseObserverBridge::SetRegisterGoogleVariationID
is called, GWS id will not be registered. This CL fixes that.

This CL also renames SetRegisterGoogleVariationID appropriately to
SetProfileSigninStatus in some files

BUG=714281
Review-Url: https://codereview.chromium.org/2834463005
Cr-Commit-Position: refs/heads/master@{#466464}
(cherry picked from commit 96efb190e51a943b44485a8b3c53338498814c43)

Review-Url: https://codereview.chromium.org/2852643002 .
Cr-Commit-Position: refs/branch-heads/3071@{#284}
Cr-Branched-From: a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed: https://chromium.googlesource.com/chromium/src/+/f13f69fe4a756b04306ee416f676812f7394826b

[Raj, 2017-04-28 05:54:32]

Description was changed from

==========
Fix race with google variation ID registration

If ExternalDataUseObserverBridge::ShouldRegisterAsDataUseObserver() is
called before ExternalDataUseObserverBridge::SetRegisterGoogleVariationID
is called, GWS id will not be registered. This CL fixes that.

This CL also renames SetRegisterGoogleVariationID appropriately to
SetProfileSigninStatus in some files

BUG=714281

Review-Url: https://codereview.chromium.org/2834463005
Cr-Commit-Position: refs/heads/master@{#466464}
(cherry picked from commit 96efb190e51a943b44485a8b3c53338498814c43)
==========

to

==========
Fix race with google variation ID registration

If ExternalDataUseObserverBridge::ShouldRegisterAsDataUseObserver() is
called before ExternalDataUseObserverBridge::SetRegisterGoogleVariationID
is called, GWS id will not be registered. This CL fixes that.

This CL also renames SetRegisterGoogleVariationID appropriately to
SetProfileSigninStatus in some files

BUG=714281

Review-Url: https://codereview.chromium.org/2834463005
Cr-Commit-Position: refs/heads/master@{#466464}
(cherry picked from commit 96efb190e51a943b44485a8b3c53338498814c43)

Review-Url: https://codereview.chromium.org/2852643002 .
Cr-Commit-Position: refs/branch-heads/3071@{#284}
Cr-Branched-From:
a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed:
https://chromium.googlesource.com/chromium/src/+/f13f69fe4a756b04306ee416f676...
==========

[Raj, 2017-04-28 05:54:33]

Committed patchset #1 (id:1) manually as
f13f69fe4a756b04306ee416f676812f7394826b.