Add some JavaDoc for DOMUtils.java.

Add some JavaDoc for DOMUtils.java.

This is written on top of the changes from:
https://codereview.chromium.org/1110833004

BUG=491588
Committed: https://crrev.com/0373e98b1e1e718af055ba74353ed3f4a4c31316
Cr-Commit-Position: refs/heads/master@{#331971}

[mlamouri (slow - plz ping), 2015-05-24 17:08:36]

mlamouri@chromium.org changed reviewers:
+ miguelg@chromium.org

[Miguel Garcia, 2015-05-26 09:30:25]

https://codereview.chromium.org/1154913003/diff/1/content/public/test/android...
File
content/public/test/android/javatests/src/org/chromium/content/browser/test/util/DOMUtils.java
(right):

https://codereview.chromium.org/1154913003/diff/1/content/public/test/android...
content/public/test/android/javatests/src/org/chromium/content/browser/test/util/DOMUtils.java:29:
* @throws TimeoutException
there is no point is adding a @throws doc unless you explain why or when is it
thrown, the signature of the method already says that we throw it.

[mlamouri (slow - plz ping), 2015-05-26 14:09:34]

Patchset #2 (id:20001) has been deleted

[mlamouri (slow - plz ping), 2015-05-26 14:14:36]

PTAL.

https://codereview.chromium.org/1154913003/diff/1/content/public/test/android...
File
content/public/test/android/javatests/src/org/chromium/content/browser/test/util/DOMUtils.java
(right):

https://codereview.chromium.org/1154913003/diff/1/content/public/test/android...
content/public/test/android/javatests/src/org/chromium/content/browser/test/util/DOMUtils.java:29:
* @throws TimeoutException
On 2015/05/26 at 09:30:25, Miguel Garcia wrote:
> there is no point is adding a @throws doc unless you explain why or when is it
thrown, the signature of the method already says that we throw it.

I added @throws because I saw that being done in ContentShellTestBase. I agree
that it doesn't sound very useful. Removed.

[Miguel Garcia, 2015-05-26 15:18:35]

lgtm

[mlamouri (slow - plz ping), 2015-05-29 14:16:31]

The CQ bit was checked by mlamouri@chromium.org

[commit-bot: I haz the power, 2015-05-29 14:17:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1154913003/40001

[commit-bot: I haz the power, 2015-05-29 15:05:38]

Committed patchset #2 (id:40001)

[commit-bot: I haz the power, 2015-05-29 15:06:54]

Patchset 2 (id:??) landed as
https://crrev.com/0373e98b1e1e718af055ba74353ed3f4a4c31316
Cr-Commit-Position: refs/heads/master@{#331971}