base: Remove the string logging from CHECK().

mojo/edk/test/mojo_test_base.cc

Index: mojo/edk/test/mojo_test_base.cc
diff --git a/mojo/edk/test/mojo_test_base.cc b/mojo/edk/test/mojo_test_base.cc
index f1032d7e3f5fe0ef45957dba5c8949cd1cdf5602..041b3d01239cada443e473944514e376b3cf13bc 100644
--- a/mojo/edk/test/mojo_test_base.cc
+++ b/mojo/edk/test/mojo_test_base.cc
@@ -72,8 +72,8 @@ MojoTestBase::ClientController::ClientController(
 }
 
 MojoTestBase::ClientController::~ClientController() {
-  CHECK(was_shutdown_)
-      << "Test clients should be waited on explicitly with WaitForShutdown().";
+  // Test clients should be waited on explicitly with WaitForShutdown().
+  CHECK(was_shutdown_);
 }
 
 void MojoTestBase::ClientController::ClosePeerConnection() {