Switch the first thread in a child process to be the main thread...

Switch the first thread in a child process to be the main thread, and make theIO thread be the second thread.  The change is needed for plugins on mac.

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=21355

[jam, 2009-07-22 22:00:01]

The patchset diff contains the fix for the reliability failures.

[darin (slow to review), 2009-07-22 22:10:18]

OK, LGTM (good luck!)

[Evan Martin, 2009-07-27 22:01:31]

http://codereview.chromium.org/155944/diff/96/1055
File chrome/browser/renderer_host/browser_render_process_host.cc (right):

http://codereview.chromium.org/155944/diff/96/1055#newcode423
Line 423: options.message_loop_type = MessageLoop::TYPE_UI;
This seems to have broken --single-process on Linux, since we can only have one
UI message loop per process.  (And even in multi-proc, our renderers don't have
access to UI stuff, so they shouldn't be UI loops anyway.)