Don't use base::MessageLoop::{Quit,QuitClosure} in mojo/

mojo/shell/capability_filter_test.cc

Index: mojo/shell/capability_filter_test.cc
diff --git a/mojo/shell/capability_filter_test.cc b/mojo/shell/capability_filter_test.cc
index f8d0349e64608b4086af808ab21d815cfd15e63a..b50f7174dd817fc0bdad75755834a264c4e2211e 100644
--- a/mojo/shell/capability_filter_test.cc
+++ b/mojo/shell/capability_filter_test.cc
@@ -83,12 +83,12 @@ class ConnectionValidator : public ApplicationLoader,
     if (i != expectations_.end()) {
       expectations_.erase(i);
       if (expectations_.empty())
-        loop_->Quit();
+        loop_->QuitWhenIdle();
     } else {
       // This is a test failure, and will result in PrintUnexpectedExpecations()
       // being called.
       unexpected_.insert(result);
-      loop_->Quit();
+      loop_->QuitWhenIdle();
     }
   }