Revert of [DevTools] Do not use AboutToNavigateRenderFrame in DevToolsUIBindings.

Revert of [DevTools] Do not use AboutToNavigateRenderFrame in DevToolsUIBindings. (patchset #1 id:1 of https://codereview.chromium.org/1360143003/ )

Reason for revert:
This patch added a race. It should be using DidStartNavigationToPendingEntry instead.

Original issue's description:
> [DevTools] Do not use AboutToNavigateRenderFrame in DevToolsUIBindings.
>
> DidStartProvisionalLoadForFrame is enough here.
>
> BUG=none
>
> Committed: https://crrev.com/ee6eca69ffbd1d510d02397df5047f27cc256e8e
> Cr-Commit-Position: refs/heads/master@{#350974}

TBR=pfeldman@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=none

Committed: https://crrev.com/e1564e729873b9b2d875a70dec2a5f4d81952dd9
Cr-Commit-Position: refs/heads/master@{#351143}

[dgozman, 2015-09-28 20:54:48]

Created Revert of [DevTools] Do not use AboutToNavigateRenderFrame in
DevToolsUIBindings.

[commit-bot: I haz the power, 2015-09-28 20:55:34]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1369413002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1369413002/1

[commit-bot: I haz the power, 2015-09-28 20:59:27]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-28 21:01:45]

Patchset 1 (id:??) landed as
https://crrev.com/e1564e729873b9b2d875a70dec2a5f4d81952dd9
Cr-Commit-Position: refs/heads/master@{#351143}