[Android WebView] Add tests for catching console messages on denied loads

[Android WebView] Add tests for catching console messages on denied loads

Add test imitating several well-known situations where loading is blocked
by Blink. Verify that clients can know about blocks via
WebChromeClient.onConsoleMessage.

Remove traces of previous attempt to add ERR_BLOCKED code.

BUG=456782
Committed: https://crrev.com/77197c1c88f260f3885dfa0962d1f899bd507859
Cr-Commit-Position: refs/heads/master@{#322185}

[mnaganov (inactive), 2015-03-24 14:43:09]

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

[sgurun-gerrit only, 2015-03-24 19:00:17]

lgtm

[sgurun-gerrit only, 2015-03-25 17:02:36]

On 2015/03/24 19:00:17, sgurun wrote:
> lgtm

landing this since Mikhail is on vacation.

[sgurun-gerrit only, 2015-03-25 17:02:39]

The CQ bit was checked by sgurun@chromium.org

[commit-bot: I haz the power, 2015-03-25 17:03:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1029313003/1

[commit-bot: I haz the power, 2015-03-25 17:25:30]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-25 17:26:02]

Patchset 1 (id:??) landed as
https://crrev.com/77197c1c88f260f3885dfa0962d1f899bd507859
Cr-Commit-Position: refs/heads/master@{#322185}