Fix WeakPtrFactory member placement

Fix WeakPtrFactory member placement

Changing in the intialization order of WeakPtrFactory in src/chrome/browser module
such that all member variables should appear before the WeakPtrFactory
to ensure that any WeakPtrs to Controller are invalidated before its members
variable's destructors are executed, rendering them invalid.

BUG=303818
Committed: https://crrev.com/dfefffa1cd3d8de20392e55bb66168c1505312d5
Cr-Commit-Position: refs/heads/master@{#296007}

[anujsharma, 2014-09-18 09:05:52]

anujk.sharma@samsung.com changed reviewers:
+ nasko@chromium.org

[anujsharma, 2014-09-18 09:05:52]

PTAL

[anujsharma, 2014-09-21 11:09:23]

anujk.sharma@samsung.com changed reviewers:
+ jam@chromium.org

[nasko, 2014-09-22 14:02:03]

lgtm

[anujsharma, 2014-09-22 16:28:06]

On 2014/09/22 14:02:03, nasko wrote:
> lgtm

Thanks nasko for lgtm.

[anujsharma, 2014-09-22 16:28:14]

The CQ bit was checked by anujk.sharma@samsung.com

[commit-bot: I haz the power, 2014-09-22 16:29:29]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/582633002/1

[commit-bot: I haz the power, 2014-09-22 17:42:13]

Committed patchset #1 (id:1) as e045f39c556c96a367d8946d6b3b522018d6aab5

[commit-bot: I haz the power, 2014-09-22 17:42:53]

Patchset 1 (id:??) landed as
https://crrev.com/dfefffa1cd3d8de20392e55bb66168c1505312d5
Cr-Commit-Position: refs/heads/master@{#296007}