Support COM in SequencedWorkerPool. This will be used by some code that

base/threading/sequenced_worker_pool.cc

Index: base/threading/sequenced_worker_pool.cc
===================================================================
--- base/threading/sequenced_worker_pool.cc	(revision 264688)
+++ base/threading/sequenced_worker_pool.cc	(working copy)
@@ -32,6 +32,8 @@
 
 #if defined(OS_MACOSX)
 #include "base/mac/scoped_nsautorelease_pool.h"
+#elif defined(OS_WIN)
+#include "base/win/scoped_com_initializer.h"
 #endif
 
 #if !defined(OS_NACL)
@@ -491,6 +493,11 @@
 }
 
 void SequencedWorkerPool::Worker::Run() {
+#if defined(OS_WIN)
+  scoped_ptr<win::ScopedCOMInitializer> com_initializer(

[darin (slow to review), 2014/04/19 04:49:07]

nit: why heap allocate? why bother with |new| and |scoped_ptr|?

[Peter Kasting, 2014/04/21 20:38:37]

Probably because I was copying code from elsewhere... you're right, this can
just be on the stack.  Fixed.

+      new win::ScopedCOMInitializer());
+#endif
+
   // Store a pointer to the running sequence in thread local storage for
   // static function access.
   g_lazy_tls_ptr.Get().Set(&running_sequence_);