Fixed drag and drop into and out of Browser Plugin.

chrome/browser/extensions/extension_test_message_listener.cc

Index: chrome/browser/extensions/extension_test_message_listener.cc
diff --git a/chrome/browser/extensions/extension_test_message_listener.cc b/chrome/browser/extensions/extension_test_message_listener.cc
index e892ba170726325004fee2004cc29b865680c5a0..f61986e85c99b908cebd7636f12af916dbc7250b 100644
--- a/chrome/browser/extensions/extension_test_message_listener.cc
+++ b/chrome/browser/extensions/extension_test_message_listener.cc
@@ -4,6 +4,7 @@
 
 #include "chrome/browser/extensions/extension_test_message_listener.h"
 
+#include "base/run_loop.h"
 #include "base/strings/string_number_conversions.h"
 #include "chrome/browser/extensions/api/test/test_api.h"
 #include "chrome/common/chrome_notification_types.h"
@@ -27,8 +28,10 @@ ExtensionTestMessageListener::~ExtensionTestMessageListener() {}
 bool ExtensionTestMessageListener::WaitUntilSatisfied()  {
   if (satisfied_)
     return !failed_;
+  base::RunLoop run_loop;
+  quit_closure_ = run_loop.QuitClosure();
   waiting_ = true;
-  content::RunMessageLoop();
+  run_loop.Run();
   return !failed_;
 }
 
@@ -63,7 +66,7 @@ void ExtensionTestMessageListener::Observe(
     }
     if (waiting_) {
       waiting_ = false;
-      MessageLoopForUI::current()->Quit();
+      quit_closure_.Run();
     }
   }
 }