[Sync] Rename SyncEnabledAndLoggedIn() to CanStartSync().

[Sync] Rename SyncEnabledAndLoggedIn() to CanStartSync().

This is part of an effort to clean up sync's state interface.
CanStartSync more accurately represents the conceptual implication of
the conditions that the method checks.

Note that at present, this does not map perfectly to what is actually
checked when sync tries to start, but that will happen in an upcoming
change.

BUG=495192
TBR=sdefresne,pkasting

Committed: https://crrev.com/96b7d277ef548f5f3d5f050efe229a719c2389fb
Cr-Commit-Position: refs/heads/master@{#334545}

[maxbogue, 2015-06-12 18:06:24]

maxbogue@chromium.org changed reviewers:
+ zea@chromium.org

[maxbogue, 2015-06-12 18:06:24]

maxbogue@chromium.org changed required reviewers:
+ zea@chromium.org

[maxbogue, 2015-06-12 18:06:25]

Hey Nicolas, here's another refactoring CL. PTAL!

[vabr (Chromium), 2015-06-14 18:53:23]

vabr@chromium.org changed reviewers:
+ vabr@chromium.org

[vabr (Chromium), 2015-06-14 18:53:24]

chrome/browser/password_manager/password_store_factory.cc LGTM.

[maxbogue, 2015-06-15 17:26:17]

maxbogue@chromium.org changed reviewers:
+ bauerb@chromium.org, benwells@chromium.org, pkasting@google.com,
sdefresne@chromium.org

[maxbogue, 2015-06-15 17:26:18]

Adding the following reviewers, who will be TBR'd if necessary:

bauerb:
  chrome/browser/android/contextualsearch/contextual_search_delegate.cc
  chrome/browser/android/most_visited_sites.cc
  chrome/browser/android/precache/precache_launcher.cc

benwells:
  chrome/browser/extensions/external_pref_loader.cc
  chrome/browser/ui/app_list/search/suggestions/suggestions_search_provider.cc

pkasting:
  chrome/browser/autocomplete/chrome_autocomplete_provider_client.cc
  chrome/browser/ui/webui/options/sync_setup_handler_unittest.cc

sdefresne:
  components/autofill/core/browser/options_util.cc
  components/autofill/core/browser/options_util_unittest.cc
  ios/chrome/browser/sync/sync_setup_service.cc

vabr:
  chrome/browser/password_manager/password_store_factory.cc

[Bernhard Bauer, 2015-06-15 17:29:01]

Android LGTM

[Peter Kasting, 2015-06-15 20:58:46]

pkasting@chromium.org changed reviewers:
+ pkasting@chromium.org

[Peter Kasting, 2015-06-15 20:58:47]

LGTM

[Nicolas Zea, 2015-06-15 23:30:14]

lgtm

[benwells, 2015-06-16 00:20:44]

lgtm

[maxbogue, 2015-06-16 01:08:14]

The CQ bit was checked by maxbogue@chromium.org

[commit-bot: I haz the power, 2015-06-16 01:08:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1175243009/60001

[commit-bot: I haz the power, 2015-06-16 03:00:08]

Committed patchset #4 (id:60001)

[commit-bot: I haz the power, 2015-06-16 03:01:08]

Patchset 4 (id:??) landed as
https://crrev.com/96b7d277ef548f5f3d5f050efe229a719c2389fb
Cr-Commit-Position: refs/heads/master@{#334545}

[sdefresne, 2015-06-16 14:07:25]

components/autofill & ios/chrome lgtm