[Sync] Rename SyncActive to IsSyncActive.

[Sync] Rename SyncActive to IsSyncActive.

This is part of an effort to clean up sync's state interface.

BUG=495192
TBR=bauerb,benwells,msw,sdefresne

Committed: https://crrev.com/192b36003ecd4265667c3625d06948bb7c3d1582
Cr-Commit-Position: refs/heads/master@{#332752}

[maxbogue, 2015-06-02 17:10:48]

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

[maxbogue, 2015-06-02 17:10:48]

PTAL; first steps of the state refactoring.

[vabr (Chromium), 2015-06-02 17:29:46]

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

[vabr (Chromium), 2015-06-02 17:29:47]

*/password_manager/* LGTM.
Also thanks for the style fixes!
Vaclav

[Nicolas Zea, 2015-06-03 17:29:56]

lgtm

[maxbogue, 2015-06-03 21:06:04]

Used git cl owners to generate this list. I'll be TBR'ing the remaining ones
since this is a very basic renaming patch.

bauerb:
  chrome/browser/android/*

benwells:
  chrome/browser/extensions/*

msw:
  chrome/browser/ui/*

sdefresne:
  chrome/browser/history/*
  components/autofill/*

vabr:
  chrome/browser/password_manager/*
  components/password_manager/*

zea:
  chrome/browser/sync/*
  chrome/browser/ui/sync/*
  components/sync_driver/*

[maxbogue, 2015-06-03 21:06:58]

The CQ bit was checked by maxbogue@chromium.org

[commit-bot: I haz the power, 2015-06-03 21:09:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1155443009/40001

[commit-bot: I haz the power, 2015-06-03 22:18:16]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-06-03 22:18:17]

Try jobs failed on following builders:
  linux_chromium_chromeos_rel_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[maxbogue, 2015-06-03 23:39:54]

The CQ bit was checked by maxbogue@chromium.org

[commit-bot: I haz the power, 2015-06-03 23:42:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1155443009/40001

[commit-bot: I haz the power, 2015-06-04 00:34:01]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-06-04 00:34:51]

Patchset 3 (id:??) landed as
https://crrev.com/192b36003ecd4265667c3625d06948bb7c3d1582
Cr-Commit-Position: refs/heads/master@{#332752}