Revert of [Android] ForeignSessionHelper string memory leak fix.

Revert of [Android] ForeignSessionHelper string memory leak fix. (https://codereview.chromium.org/257513007/)

Reason for revert:
The CQ seems to have ignored the trybot failures on `android_dbg_triggered_tests`. Step `unit_tests` failing since http://build.chromium.org/p/chromium.linux/builders/Android%20Tests/builds/13319

Failures on GCMServiceTest.* and ZipTest.ZipTimeStamp. Suspecting this CL.

Original issue's description:
> [Android] Delete local java reference every loop.
> 
> In ForeignSessionHelper class, there were two places
> we allocate ScopedJavaLocalRef<jstring> inside a loop and
> doesn't delete. The Java local references are cleaned upon
> returning to Java, but there is 512 local reference hard-limit 
> so we should delete it every loop to avoid hitting the limit.
> 
> BUG=366659
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=266398

TBR=feng@chromium.org,newt@chromium.org,kkimlabs@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=366659

[tapted, 2014-04-28 01:04:18]

Created Revert of [Android] ForeignSessionHelper string memory leak fix.

[commit-bot: I haz the power, 2014-04-28 01:05:11]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tapted@chromium.org/254713007/1

[tapted, 2014-04-28 01:05:43]

The CQ bit was unchecked by tapted@chromium.org

[commit-bot: I haz the power, 2014-04-28 01:06:11]

The CQ bit was unchecked by commit-bot@chromium.org

[tapted, 2014-04-28 01:12:19]

On 2014/04/28 01:05:43, tapted wrote:
> The CQ bit was unchecked by mailto:tapted@chromium.org

hmm GCMServiceTest.SignOutAndThenSignIn has been failing since r266242 e.g.
http://build.chromium.org/p/chromium.linux/builders/Android%20Tests%20%28dbg%...
so I unchecked the commit box.

However only
http://build.chromium.org/p/chromium.linux/builders/Android%20Tests/builds/13319
 is showing the failures on
GCMServiceTest.SignInAndSignOutUnderPositiveChannelSignal . .. I'll see what the
next cycle does.

[tapted, 2014-04-28 02:55:15]

Update: filed bug http://crbug.com/367600

Closing this CL