Revert of Revert "TestWebServer needs to use a free port."

Revert of Revert "TestWebServer needs to use a free port." (patchset #1 of https://codereview.chromium.org/514443002/)

Reason for revert:
I will land the following CL to fix the findbugs warning
https://codereview.chromium.org/513583002/

Then I will revert the revert.

Original issue's description:
> Revert "TestWebServer needs to use a free port."
> 
> Causing Android Build (dbg) findbugs to fail.
> 
> This reverts commit c4a3f88c4434e86057a8c7ae4e109b8be4138d8f.
> 
> BUG=none
> TBR=hush
> 
> Committed to pending queue: https://chromium.googlesource.com/chromium/src/+/b055d91

TBR=ajwong@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=none

Committed: https://crrev.com/955c8c92ba0f33666d911b015f5c36fc2303dc6f
Cr-Commit-Position: refs/heads/master@{#292218}

[hush (inactive), 2014-08-27 01:21:23]

Created Revert of Revert "TestWebServer needs to use a free port."

[hush (inactive), 2014-08-27 01:23:02]

hush@chromium.org changed reviewers:
+ yfriedman@chromium.org

[Yaron, 2014-08-27 05:31:05]

https://codereview.chromium.org/512573002/diff/1/net/test/android/javatests/s...
File
net/test/android/javatests/src/org/chromium/net/test/util/TestWebServer.java
(right):

https://codereview.chromium.org/512573002/diff/1/net/test/android/javatests/s...
net/test/android/javatests/src/org/chromium/net/test/util/TestWebServer.java:63:
public class TestWebServer {
Just upload the fix to this issue so you don't have to land both.

[hush (inactive), 2014-08-27 17:09:27]

On 2014/08/27 05:31:05, Yaron wrote:
>
https://codereview.chromium.org/512573002/diff/1/net/test/android/javatests/s...
> File
> net/test/android/javatests/src/org/chromium/net/test/util/TestWebServer.java
> (right):
> 
>
https://codereview.chromium.org/512573002/diff/1/net/test/android/javatests/s...
>
net/test/android/javatests/src/org/chromium/net/test/util/TestWebServer.java:63:
> public class TestWebServer {
> Just upload the fix to this issue so you don't have to land both.

sure.
Please see patch set 3.

[Yaron, 2014-08-27 18:06:33]

lgtm

[hush (inactive), 2014-08-27 21:03:29]

The CQ bit was checked by hush@chromium.org

[commit-bot: I haz the power, 2014-08-27 21:04:19]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/hush@chromium.org/512573002/40001

[commit-bot: I haz the power, 2014-08-27 21:05:32]

Committed patchset #2 (id:40001) as 27777388a37d12dd7cbdd397c07874261c28206b

[commit-bot: I haz the power, 2014-09-10 02:53:53]

Patchset 2 (id:??) landed as
https://crrev.com/955c8c92ba0f33666d911b015f5c36fc2303dc6f
Cr-Commit-Position: refs/heads/master@{#292218}