Add branch-prediction hint to FAST_RETURN_IF_NO_FRONTENDS.
<http://webkit.org/b/115357>

Reviewed by Anders Carlsson.

Since this macro is used in some very hot code paths, give the compiler an extra hint
to try and minimize the impact it has when the inspector is not active.

* inspector/InspectorInstrumentation.h:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@149294 268f45cc-cd09-0410-ab3c-d52691b4dbfc
[WIN] Add workaround for UNUSED_PARAM()
https://bugs.webkit.org/show_bug.cgi?id=115350

Reviewed by Andreas Kling.

r147882 added an workaround for the MSVC compiler on Windows CE.
Extend this workaround to whole MSVC compiler, since the same
problem occurs with the Visual Studio 10 compiler too.

* wtf/UnusedParam.h:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@149295 268f45cc-cd09-0410-ab3c-d52691b4dbfc