OOR-CORS: SharedCorsOriginAccessList should not be copyable

In the previous change, I forgot to add DISALLOW_COPY_AND_ASSIGN
macro to the SharedCorsOriginAccessList.

Bug: N/A
Change-Id: Ib23a0d04392c76eca5865632e616ff3aaf3b671e
Reviewed-on: https://chromium-review.googlesource.com/c/1438779Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Takashi Toyoshima <toyoshim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#626936}

content/public/browser/shared_cors_origin_access_list.h

@@ -7,6 +7,7 @@
 
 #include <vector>
 
+#include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_refptr.h"
 #include "content/common/content_export.h"
@@ -60,6 +61,8 @@ class CONTENT_EXPORT SharedCorsOriginAccessList
 
  private:
   friend class base::RefCountedThreadSafe<SharedCorsOriginAccessList>;
+
+  DISALLOW_COPY_AND_ASSIGN(SharedCorsOriginAccessList);
 };
 
 }  // namespace content