[Android WebView] Fix up and re-indent some of the tests

[Android WebView] Fix up and re-indent some of the tests

While working on some other issue, I have noticed that `AwTestBase.loadUrl`
doesn't call the same overload of `AwContents.loadUrl` that WebView API
does, which can lead to different behaviour of tests vs. real apps.

Also, fixed some stuff in `AwContentsTest.testJavaBridge`, and figured
out that this test works despite what our documentation says about
availability of injected objects, filed http://crbug.com/476880.

Committed: https://crrev.com/7d82b15aae9bac0ab0c9925a46cd3ab3b44aed7e
Cr-Commit-Position: refs/heads/master@{#325421}

[mnaganov (inactive), 2015-04-14 12:15:18]

mnaganov@chromium.org changed reviewers:
+ torne@chromium.org

[mnaganov (inactive), 2015-04-14 12:15:19]

PTAL, a trivial change.

[mnaganov (inactive), 2015-04-16 10:56:54]

Ping?

[Torne, 2015-04-16 11:23:07]

LGTM; sorry, this got buried :)

[mnaganov (inactive), 2015-04-16 11:28:16]

The CQ bit was checked by mnaganov@chromium.org

[commit-bot: I haz the power, 2015-04-16 11:29:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1083023002/1

[commit-bot: I haz the power, 2015-04-16 11:52:17]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-16 11:53:16]

Patchset 1 (id:??) landed as
https://crrev.com/7d82b15aae9bac0ab0c9925a46cd3ab3b44aed7e
Cr-Commit-Position: refs/heads/master@{#325421}