Refactoring the weak_ptr_factory order in content/browser/renderer_host

Refactoring the weak_ptr_factory order in content/browser/renderer_host

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/eef1b5914f37b0fb0edbd1c340a60332d5453453
Cr-Commit-Position: refs/heads/master@{#294637}

[MRV, 2014-09-12 06:29:58]

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

[MRV, 2014-09-12 06:29:59]

PTAL

[Avi (use Gerrit), 2014-09-12 15:31:35]

lgtm

stampity stamp

[MRV, 2014-09-12 18:08:35]

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

[MRV, 2014-09-12 18:13:51]

On 2014/09/12 15:31:35, Avi wrote:
> lgtm
> 
> stampity stamp

Dear mr.avi.. thanks for lgtm

[commit-bot: I haz the power, 2014-09-12 18:19:41]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/567923002/1

[commit-bot: I haz the power, 2014-09-12 19:44:31]

Committed patchset #1 (id:1) as 6f559b2941bbe4fedc4d73f7fbf9ea9fd6878105

[commit-bot: I haz the power, 2014-09-12 19:50:23]

Patchset 1 (id:??) landed as
https://crrev.com/eef1b5914f37b0fb0edbd1c340a60332d5453453
Cr-Commit-Position: refs/heads/master@{#294637}