Fix memory leak in MediaStreamImplTest.

content/renderer/media/media_stream_impl_unittest.cc

Index: content/renderer/media/media_stream_impl_unittest.cc
diff --git a/content/renderer/media/media_stream_impl_unittest.cc b/content/renderer/media/media_stream_impl_unittest.cc
index a821d1485ea89ea7b34e1249e4b6c6b8db2db685..8703374586f4ce81a5cad51bd92e1046fbcf8085 100644
--- a/content/renderer/media/media_stream_impl_unittest.cc
+++ b/content/renderer/media/media_stream_impl_unittest.cc
@@ -34,6 +34,13 @@ class MediaStreamImplTest : public ::testing::Test {
                                        dependency_factory));
   }
 
+  void TearDown() {
+    // Make sure the message created by
+    // P2PSocketDispatcher::AsyncMessageSender::Send is handled before
+    // tear down to avoid a memory leak.
+    loop_.RunAllPending();
+  }
+
  protected:
   MessageLoop loop_;
   scoped_ptr<MockMediaStreamDispatcher> ms_dispatcher_;