Revert 176882 - Test fails on Win Aura.

Revert 176882 - Test fails on Win Aura.

> Test that 404 subresource bodies with nested message loops don't crash.
> 
> This is a browser test because DumpRenderTree doesn't run nested message loops. The failure case was that a nested message triggered from an element that has signalled an error but had an open request would receive a body for the request and crash/fail an assertion.
> 
> This test checks the WebKit side fix for this issue, see https://bugs.webkit.org/show_bug.cgi?id=103563
> 
> R=sky@chromium.org
> 
> Review URL: https://chromiumcodereview.appspot.com/11778083

TBR=gavinp@chromium.org

[Patrick Dubroy, 2013-01-15 13:58:10]

This test is failing on Win Aura:
http://build.chromium.org/p/chromium.win/builders/Win%20Aura%20Tests%20%281%2...

[==========] Running 1 test from 1 test case.
[----------] Global test environment set-up.
[----------] 1 test from WebKitBrowserTest, where TypeParam = 
[ RUN      ] WebKitBrowserTest.ErrorBodyNoCrash
[4744:4296:0115/054550:1754792:ERROR:gl_surface_egl.cc(100)] eglInitialize
failed with error UNKNOWN
[4744:4296:0115/054550:1754792:ERROR:gl_surface_win.cc(54)]
GLSurfaceEGL::InitializeOneOff failed.
[4744:4296:0115/054550:1754792:ERROR:compositor.cc(151)] Could not load the GL
bindings
[4744:4296:0115/054550:1754792:ERROR:desktop_root_window_host_win.cc(587)] NOT
IMPLEMENTED
HTTP server started on 127.0.0.1:51772...
sending server_data: {"host": "127.0.0.1", "port": 51772} (36 bytes)
[4744:4296:0115/054552:1757101:ERROR:desktop_root_window_host_win.cc(587)] NOT
IMPLEMENTED
c:\b\build\slave\win_aura_builder\build\src\content\browser\webkit_browsertest.cc(91):
error: Value of: shell()->web_contents()->IsCrashed()
  Actual: true
Expected: false
[  FAILED  ] WebKitBrowserTest.ErrorBodyNoCrash, where TypeParam =  and
GetParam() =  (3824 ms)
[----------] 1 test from WebKitBrowserTest (3824 ms total)

[gavinp, 2013-01-17 14:42:37]

LGTM.

Boy this is going to be fun to figure out.

Japhat, how much does this scare you? The WebKit rev seems to include my fix
(some aura tries earlier were using WebKit older than LKGR...), but still the
crash. I'll spin up a win aura build ASAP to test this, but it could be a week
or two unless we panic.