Fix WeakPtrFactory member ordering in chrome/browser

Fix WeakPtrFactory member ordering in chrome/browser

Changing in the intialization order of WeakPtrFactory 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/14cb4ad4c4a9289944ae1f0ff6485d38b1278c83
Cr-Commit-Position: refs/heads/master@{#295303}

[MRV, 2014-09-17 06:04:15]

mohan.reddy@samsung.com changed reviewers:
+ sky@chromium.org

[MRV, 2014-09-17 06:04:15]

PTAL

[sky, 2014-09-17 14:40:46]

LGTM

[MRV, 2014-09-17 17:04:12]

The CQ bit was checked by mohan.reddy@samsung.com

[commit-bot: I haz the power, 2014-09-17 17:05:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/575993002/1

[MRV, 2014-09-17 17:21:41]

On 2014/09/17 14:40:46, sky wrote:
> LGTM

Dear mr.sky.. thank you for LGTM

[commit-bot: I haz the power, 2014-09-17 18:15:21]

Committed patchset #1 (id:1) as 6f016551ffb152f8cf38b7c151f3079b0884e30c

[commit-bot: I haz the power, 2014-09-17 18:15:54]

Patchset 1 (id:??) landed as
https://crrev.com/14cb4ad4c4a9289944ae1f0ff6485d38b1278c83
Cr-Commit-Position: refs/heads/master@{#295303}