Made MessagePump a non-thread safe class.

chrome/browser/ui/cocoa/browser/avatar_menu_bubble_controller_unittest.mm

Index: chrome/browser/ui/cocoa/browser/avatar_menu_bubble_controller_unittest.mm
diff --git a/chrome/browser/ui/cocoa/browser/avatar_menu_bubble_controller_unittest.mm b/chrome/browser/ui/cocoa/browser/avatar_menu_bubble_controller_unittest.mm
index 05304e84dbea61b638442f858ddda2637dbe1bd6..b80a2a8914801d03d4cfb6122fbda3f23494aea0 100644
--- a/chrome/browser/ui/cocoa/browser/avatar_menu_bubble_controller_unittest.mm
+++ b/chrome/browser/ui/cocoa/browser/avatar_menu_bubble_controller_unittest.mm
@@ -5,6 +5,7 @@
 #import "chrome/browser/ui/cocoa/browser/avatar_menu_bubble_controller.h"
 
 #include "base/mac/scoped_nsobject.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_pump_mac.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/prefs/pref_service_syncable.h"
@@ -142,7 +143,7 @@ TEST_F(AvatarMenuBubbleControllerTest, PerformLayout) {
 @interface TestingAvatarMenuItemController : AvatarMenuItemController
                                                  <NSAnimationDelegate> {
  @private
-  scoped_refptr<base::MessagePumpNSRunLoop> pump_;
+  scoped_ptr<base::MessagePumpNSRunLoop> pump_;
 }
 // After calling |-highlightForEventType:| an animation will possibly be
 // started. Since the animation is non-blocking, the run loop will need to be
@@ -152,8 +153,8 @@ TEST_F(AvatarMenuBubbleControllerTest, PerformLayout) {
 
 @implementation TestingAvatarMenuItemController
 - (void)runMessagePump {
-  if (!pump_.get())
-    pump_ = new base::MessagePumpNSRunLoop;
+  if (!pump_)
+    pump_.reset(new base::MessagePumpNSRunLoop);
   pump_->Run(NULL);
 }