Moving more tests to app_shell_browsertests.

Moving more tests to app_shell_browsertests.

This CL adds the following tests to app_shell_browsertests:
WebViewAPITest.testAssignSrcAfterCrash
WebViewAPITest.testCannotMutateEventName
WebViewAPITest.testContentLoadEvent
WebViewAPITest.tDestroyOnEventListener
WebViewAPITest.testDisplayNoneWebviewLoad
WebViewAPITest.testDisplayNoneWebviewRemoveChild
WebViewAPITest.testExecuteScript
WebViewAPITest.testExecuteScriptFail

BUG=352293
Committed: https://crrev.com/9ffe59798e0d724b3e996bbd07bc3376ea130d58
Cr-Commit-Position: refs/heads/master@{#297256}

[lfg, 2014-09-26 22:09:37]

lfg@chromium.org changed reviewers:
+ fsamuel@chromium.org

[Fady Samuel, 2014-09-29 12:13:50]

lgtm

[lfg, 2014-09-29 17:58:18]

lfg@chromium.org changed reviewers:
+ yoz@chromium.org

[Yoyo Zhou, 2014-09-29 20:54:02]

LGTM

[lfg, 2014-09-29 20:55:43]

The CQ bit was checked by lfg@chromium.org

[commit-bot: I haz the power, 2014-09-29 20:57:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/607913005/20001

[commit-bot: I haz the power, 2014-09-29 21:02:41]

Committed patchset #2 (id:20001) as b5323f1753b94d073d7083165f213ed97cbeca2f

[commit-bot: I haz the power, 2014-09-29 21:05:28]

Patchset 2 (id:??) landed as
https://crrev.com/9ffe59798e0d724b3e996bbd07bc3376ea130d58
Cr-Commit-Position: refs/heads/master@{#297256}