Attempt to fix a IAT unpatch crash.

Attempt to fix a IAT unpatch crash.

The IAT destructor (which will unpatch) now should run at AtExitManager shutdown, which is before we return from main().  It was a static constructor (bad), which registers an atexit() destructor which happens sometime during ExitProcess / LdrShutdown.

Also this removes some static constructors (the iat patchers, the throttle_queue, etc).  I removed a StatsCounter completely, removing its static initializer.

BUG=6886

[Dean McNamee, 2009-01-23 15:09:16]

This code is kinda a mess.  Sorry about killing the StatsCounter, but I didn't
feel like doing all of the wrapping required for a lazy initialized object with
constructor arguments, etc.

This kills 4 static initializers, and maybe fixes a crasher.

[jam, 2009-01-23 19:26:22]

lgtm

For the windowless throttling, I'm not really sure if we need that code anymore
because of semi-recent performance improvements.  But I'll look at it later.

http://codereview.chromium.org/18712/diff/1/2
File webkit/glue/plugins/webplugin_delegate_impl.cc (right):

http://codereview.chromium.org/18712/diff/1/2#newcode575
Line 575: 
nit: no need for extra line?