Revert 287689 "Add integration browser tests for settings harden..."

Revert 287689 "Add integration browser tests for settings harden..."

Broken official Windows builder:

http://build.chromium.org/p/chromium.chrome/builders/Google%20Chrome%20Win/builds/25818

> Add integration browser tests for settings hardening.
> 
> This CL introduces the PrefHashBrowserTestBase fixture which these tests are based on.
> 
> This fixture (in conjunction with the new PREF_HASH_BROWSER_TEST macro) provides an easy way to override 3 methods in order to:
>  1) Setup Chrome as desired in a PRE_ test.
>  2) Attack Preferences while Chrome isn't running.
>  3) Relaunch Chrome and verify reaction to attacks.
> 
> The fixture+macro also parametrizes every test such that they are ran in every SettingsEnforcement trial group.
> 
> A few pieces were resurrected from the old PrefHashBrowserTest used to test unloaded profile seeding prior to http://crrev.com/277209
> 
> Review URL: https://codereview.chromium.org/431973002

TBR=gab@chromium.org,erikwright@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=287717

[Adam Rice, 2014-08-06 07:02:07]

Committed patchset #1 manually as r287717 (tree was closed).