re-assign history after BFCache back

[kimwz]

History variable should be handled like the location variable after BFCache back

[IgorMinar]

I'm sorry, but I wasn't able to verify your CLA signature. CLA signature is required for any code contributions to AngularJS.

Please sign our CLA and ensure that the CLA signature email address and the email address in this PR's commits match.

If you signed the CLA as a corporation, please let me know the company's name.

Thanks a bunch!

PS: If you signed the CLA in the past then most likely the email addresses don't match. Please sign the CLA again or update the email address in the commit of this PR.
PS2: If you are a Googler, please sign the CLA as well to simplify the CLA verification process.

[kimwz]

I signed the CLA. what should I do next?

[IgorMinar]

merged. thanks

[IgorMinar]

can you please sign the CLA one more time with email address you used in the commit (see: https://github.com/angular/angular.js/pull/5425.patch)

if you don't sign with that email address, I'll have to revert the commit.

thanks!

[kimwz]

signed with the email

[IgorMinar]

thanks!