Fix chrome_FileThread crash on windows

The file thread won't do anyting if it uses the Qt event loop therefore
it won't quit properly and this behavior leads to a crash.
Thus the chromium's IO message loop should be used on Windows too.

Change-Id: Ieea0ceb8bd732ed6c9ca172620511d78b0a5d95c
Reviewed-by: Andras Becsi <andras.becsi@digia.com>
Fix Renderer and GPU threads on windows

These threads are using the UI message loop on Windows per default. This
won't work since the UI message loop is handled by Qt and the Renderer
and GPU threads won't work with it properly.
Force these threads for using the default message loop as they use it on
Linux platform.

Change-Id: Ie3582583e5d1644faa2875e015a0908ba148d91f
Reviewed-by: Andras Becsi <andras.becsi@digia.com>
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>
fix ARMv6 detection for v8.

The linux kernel now reports the processor information
in "model name" and not in "Processor" anymore.
Both should be checked for backwards compatibility.

As described by:
https://code.google.com/p/v8/issues/detail?id=3112#c16

Change-Id: I8828c1a567281e0d7000106338a2033627e8e397
Reviewed-by: Andras Becsi <andras.becsi@digia.com>