Refactoring the weak_ptr_factory order in src/content/common

Refactoring the weak_ptr_factory order in src/content/common

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/ef20600e0dd7b45483a8e5264df36304a8ecef5d
Cr-Commit-Position: refs/heads/master@{#294551}

[MRV, 2014-09-12 05:17:48]

mohan.reddy@samsung.com changed reviewers:
+ jam@chromium.org, piman@chromium.org

[MRV, 2014-09-12 05:17:48]

jam@chromium.org: Please review changes in src/ontent/common folder

piman@chromium.org: Please review changes in src/ontent/common folder

[piman, 2014-09-12 05:33:43]

lgtm

[MRV, 2014-09-12 05:35:23]

On 2014/09/12 05:33:43, piman (Very slow to review) wrote:
> lgtm

Thanks you Mr. piman for LGTM

[MRV, 2014-09-12 05:35:30]

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

[commit-bot: I haz the power, 2014-09-12 05:36:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/565833002/1

[commit-bot: I haz the power, 2014-09-12 06:42:45]

Committed patchset #1 (id:1) as 77a92d54d5a24eb1c6934f7872dce2996674b687

[commit-bot: I haz the power, 2014-09-12 06:44:38]

Patchset 1 (id:??) landed as
https://crrev.com/ef20600e0dd7b45483a8e5264df36304a8ecef5d
Cr-Commit-Position: refs/heads/master@{#294551}