Tiny CSP optimization (per spec, http: implies https:).

src/common/CapsCSP.js

@@ -11,7 +11,7 @@ function CapsCSP(baseCSP = new CSP()) {
         blockedTypes.add("worker");
         if (!blockedTypes.has("object")) {
           // data: URIs loaded in objects may run scripts
-          blockedTypes.add({name: "object", value: "http: https:"}); 
+          blockedTypes.add({name: "object", value: "http:"});
         }
       }
 
@@ -20,7 +20,7 @@ function CapsCSP(baseCSP = new CSP()) {
         // for instance data: and blob: URIs
         for (let type of this.dataUriTypes) {
           if (blockedTypes.delete(type)) {
-            blockedTypes.add({name: type, value: "http: https:"});
+            blockedTypes.add({name: type, value: "http:"});
           }
         }
       }