[Merge to 2785] Fix many memory leaks in chrome/browser/ui/cocoa/omnibox.

[Merge to 2785] Fix many memory leaks in chrome/browser/ui/cocoa/omnibox.

> Each time I type or delete a character from the omnibox, UpdatePopupApperance is
> called at least 3 times. Each call to OmniboxPopupViewMac::UpdatePopupApperance
> was leaking an NSViewController*, as well as all omnibox results.
>
> BUG=636632
>
> Review-Url: https://codereview.chromium.org/2233123003
> Cr-Commit-Position: refs/heads/master@{#411637}
> (cherry picked from commit b87e1820a06ac5dd1d9881be5342286fac920e43)

Committed: https://chromium.googlesource.com/chromium/src/+/7e53ed2c594fff414ec56f1ae97bfbd297f1d352

[erikchen, 2016-08-15 22:25:39]

Description was changed from

==========
[Merge to 2785] Fix many memory leaks in chrome/browser/ui/cocoa/omnibox.

> Each time I type or delete a character from the omnibox, UpdatePopupApperance
is
> called at least 3 times. Each call to
OmniboxPopupViewMac::UpdatePopupApperance
> was leaking an NSViewController*, as well as all omnibox results.
>
> BUG=636632
>
> Review-Url: https://codereview.chromium.org/2233123003
> Cr-Commit-Position: refs/heads/master@{#411637}
> (cherry picked from commit b87e1820a06ac5dd1d9881be5342286fac920e43)
==========

to

==========
[Merge to 2785] Fix many memory leaks in chrome/browser/ui/cocoa/omnibox.

> Each time I type or delete a character from the omnibox, UpdatePopupApperance
is
> called at least 3 times. Each call to
OmniboxPopupViewMac::UpdatePopupApperance
> was leaking an NSViewController*, as well as all omnibox results.
>
> BUG=636632
>
> Review-Url: https://codereview.chromium.org/2233123003
> Cr-Commit-Position: refs/heads/master@{#411637}
> (cherry picked from commit b87e1820a06ac5dd1d9881be5342286fac920e43)

Committed:
https://chromium.googlesource.com/chromium/src/+/7e53ed2c594fff414ec56f1ae97b...
==========

[erikchen, 2016-08-15 22:25:40]

Committed patchset #1 (id:1) manually as
7e53ed2c594fff414ec56f1ae97bfbd297f1d352.