Made MessagePump a non-thread safe class.

base/message_loop/message_pump_io_ios_unittest.cc

Index: base/message_loop/message_pump_io_ios_unittest.cc
diff --git a/base/message_loop/message_pump_io_ios_unittest.cc b/base/message_loop/message_pump_io_ios_unittest.cc
index 5fbba6968e6251e79b680b469091bda44c794c91..9c7a8fbf651fb851abc3c14e88496a5d7b232a98 100644
--- a/base/message_loop/message_pump_io_ios_unittest.cc
+++ b/base/message_loop/message_pump_io_ios_unittest.cc
@@ -126,7 +126,7 @@ class DeleteWatcher : public BaseWatcher {
 };
 
 TEST_F(MessagePumpIOSForIOTest, DeleteWatcher) {
-  scoped_refptr<MessagePumpIOSForIO> pump(new MessagePumpIOSForIO);
+  scoped_ptr<MessagePumpIOSForIO> pump(new MessagePumpIOSForIO);
   MessagePumpIOSForIO::FileDescriptorWatcher* watcher =
       new MessagePumpIOSForIO::FileDescriptorWatcher;
   DeleteWatcher delegate(watcher);
@@ -162,9 +162,9 @@ class StopWatcher : public BaseWatcher {
 };
 
 TEST_F(MessagePumpIOSForIOTest, StopWatcher) {
-  scoped_refptr<MessagePumpIOSForIO> pump(new MessagePumpIOSForIO);
+  scoped_ptr<MessagePumpIOSForIO> pump(new MessagePumpIOSForIO);
   MessagePumpIOSForIO::FileDescriptorWatcher watcher;
-  StopWatcher delegate(&watcher, pump);
+  StopWatcher delegate(&watcher, pump.get());
   pump->WatchFileDescriptor(pipefds_[1],
       false, MessagePumpIOSForIO::WATCH_READ_WRITE, &watcher, &delegate);
 
@@ -173,9 +173,9 @@ TEST_F(MessagePumpIOSForIOTest, StopWatcher) {
 }
 
 TEST_F(MessagePumpIOSForIOTest, StopWatcherAndWatchSomethingElse) {
-  scoped_refptr<MessagePumpIOSForIO> pump(new MessagePumpIOSForIO);
+  scoped_ptr<MessagePumpIOSForIO> pump(new MessagePumpIOSForIO);
   MessagePumpIOSForIO::FileDescriptorWatcher watcher;
-  StopWatcher delegate(&watcher, pump, alternate_pipefds_[1]);
+  StopWatcher delegate(&watcher, pump.get(), alternate_pipefds_[1]);
   pump->WatchFileDescriptor(pipefds_[1],
       false, MessagePumpIOSForIO::WATCH_READ_WRITE, &watcher, &delegate);