TestRunner library classes should be marked as NonCopyable.

Source/testing/runner/MockWebMediaStreamCenter.h

Index: Source/testing/runner/MockWebMediaStreamCenter.h
diff --git a/Source/testing/runner/MockWebMediaStreamCenter.h b/Source/testing/runner/MockWebMediaStreamCenter.h
index e8694b9c76528b83fe2029386fb67c1bc7c30cec..356a5afe3592782ef51c95354da9be537850eed8 100644
--- a/Source/testing/runner/MockWebMediaStreamCenter.h
+++ b/Source/testing/runner/MockWebMediaStreamCenter.h
@@ -33,6 +33,7 @@
 
 #include "TestCommon.h"
 #include "public/platform/WebMediaStreamCenter.h"
+#include "public/platform/WebNonCopyable.h"
 
 namespace WebKit {
 class WebMediaStreamCenterClient;
@@ -40,7 +41,7 @@ class WebMediaStreamCenterClient;
 
 namespace WebTestRunner {
 
-class MockWebMediaStreamCenter : public WebKit::WebMediaStreamCenter {
+class MockWebMediaStreamCenter : public WebKit::WebMediaStreamCenter, public WebKit::WebNonCopyable {
 public:
     explicit MockWebMediaStreamCenter(WebKit::WebMediaStreamCenterClient*);