TestRunner library classes should be marked as NonCopyable.

Source/testing/runner/TestInterfaces.h

Index: Source/testing/runner/TestInterfaces.h
diff --git a/Source/testing/runner/TestInterfaces.h b/Source/testing/runner/TestInterfaces.h
index 4d617fa3cab4bada65a3850fabea2df6b6e33235..cb28f311d08aebbe0cdc3455ba082c19e5b3a9a6 100644
--- a/Source/testing/runner/TestInterfaces.h
+++ b/Source/testing/runner/TestInterfaces.h
@@ -31,6 +31,8 @@
 #ifndef TestInterfaces_h
 #define TestInterfaces_h
 
+#include "public/platform/WebNonCopyable.h"
+
 #include <memory>
 #include <vector>
 
@@ -57,7 +59,7 @@ class TextInputController;
 class WebTestDelegate;
 class WebTestProxyBase;
 
-class TestInterfaces {
+class TestInterfaces : public WebKit::WebNonCopyable {
 public:
     TestInterfaces();
     ~TestInterfaces();