Mac: Make TransportDIB::Create() work.
Mac: Make TransportDIB::Create() work.

This is never called from "live" code, but chrome/browser/tab_contents/thumbnail_generator.cc uses it. ThumbnailGenerator is currently used only on windows, but I'd like to use it on OS X.

TransportDIB::Create() isn't called on OS X because all created by chrome/browser/renderer_host/render_widget_helper.cc, which creates only the shared memory object and stores it away. The actual TransportDIB is created by calls to TransportDIB::Map() in both browser and renderer processes.

Review URL: http://codereview.chromium.org/3020008

git-svn-id: http://src.chromium.org/svn/trunk/src@52835 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 825172f7e2a1b6d610c59231463e96b3bfc5a83f
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser