Switch MessagePumpForIO to use completion ports on Windows....

net/disk_cache/disk_cache_test_base.cc

Index: net/disk_cache/disk_cache_test_base.cc
===================================================================
--- net/disk_cache/disk_cache_test_base.cc	(revision 4870)
+++ net/disk_cache/disk_cache_test_base.cc	(working copy)
@@ -8,6 +8,10 @@
 #include "net/disk_cache/disk_cache_test_util.h"
 #include "net/disk_cache/mem_backend_impl.h"
 
+void DiskCacheTest::TearDown() {
+  MessageLoop::current()->RunAllPending();
+}
+
 void DiskCacheTestWithCache::SetMaxSize(int size) {
   size_ = size;
   if (cache_impl_)
@@ -73,6 +77,7 @@
 
 
 void DiskCacheTestWithCache::TearDown() {
+  MessageLoop::current()->RunAllPending();
   delete cache_;
 
   if (!memory_only_) {