Declaring the weak_ptr_factory in proper order.

Declaring the weak_ptr_factory in proper order.

Cleaning up weak_ptr_factory destruction order in "src/chrome/browser/history"
module. WeakPtrFactory should remain the last member so it'll be destroyed and
invalidate its weak pointers before any other members are destroyed.

BUG=303818
Committed: https://crrev.com/37571758dd8c08439ce7a135463ccb57b958af99
Cr-Commit-Position: refs/heads/master@{#295926}

[Anand Ratn (left samsung), 2014-09-17 10:18:15]

anand.ratn@samsung.com changed reviewers:
+ brettw@chromium.org, jochen@chromium.org, thestig@chromium.org

[Anand Ratn (left samsung), 2014-09-17 10:18:16]

brettw@chromium.org: Please review changes in src/chrome/browser/history module

jochen@chromium.org: Please review changes in src/chrome/browser/history module

thestig@chromium.org: Please review changes in src/chrome/browser/history module

[jochen (gone - plz use gerrit), 2014-09-17 18:13:06]

lgtm

[Anand Ratn (left samsung), 2014-09-22 05:19:36]

The CQ bit was checked by anand.ratn@samsung.com

[commit-bot: I haz the power, 2014-09-22 05:20:45]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/574313002/1

[commit-bot: I haz the power, 2014-09-22 05:22:58]

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

[commit-bot: I haz the power, 2014-09-22 05:22:59]

Try jobs failed on following builders:
  mac_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/mac_gpu/builds/58849)

[Anand Ratn (left samsung), 2014-09-22 05:46:26]

The CQ bit was checked by anand.ratn@samsung.com

[commit-bot: I haz the power, 2014-09-22 05:46:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/574313002/40001

[commit-bot: I haz the power, 2014-09-22 06:15:49]

Committed patchset #3 (id:40001) as 7306da0048881a6572cbef0ceccb1faebf270c08

[commit-bot: I haz the power, 2014-09-22 06:16:30]

Patchset 3 (id:??) landed as
https://crrev.com/37571758dd8c08439ce7a135463ccb57b958af99
Cr-Commit-Position: refs/heads/master@{#295926}