[Chromium] Move WebKitPlatformSupport declaration to Platform.h
https://bugs.webkit.org/show_bug.cgi?id=110262

Reviewed by Adam Barth.

In preparation for removing WebKitPlatformSupport.h entirely (once
downstream references to that file have been updated). Part of a
larger refactoring series; see tracking bug 82948.

Source/Platform:

* chromium/public/Platform.h:
(WebKitPlatformSupport):
(WebKit::WebKitPlatformSupport::~WebKitPlatformSupport):
(WebKit):

Source/WebKit/chromium:

* public/platform/WebKitPlatformSupport.h:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@143496 268f45cc-cd09-0410-ab3c-d52691b4dbfc
[chromium] Unreviewed gardening.

Patch by Ian Vollick <vollick@chromium.org> on 2013-02-20

* platform/chromium/TestExpectations:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@143497 268f45cc-cd09-0410-ab3c-d52691b4dbfc