Consider effective CSP in js combiner cache key suffix
diff --git a/net/instaweb/rewriter/js_combine_filter.cc b/net/instaweb/rewriter/js_combine_filter.cc
index c070eb0..fafe0e7 100644
--- a/net/instaweb/rewriter/js_combine_filter.cc
+++ b/net/instaweb/rewriter/js_combine_filter.cc
@@ -386,7 +386,10 @@
   virtual GoogleString CacheKeySuffix() const {
     // Updated to make sure certain bugfixes actually deploy, and we don't
     // end up using old broken cached version.
-    return "v4";
+    MD5Hasher hasher;
+    auto id = StrCat("v4|",
+                       Driver()->content_security_policy().ToIdentityString());
+    return hasher.Hash(id);
   }
 
  private: