Bug 840388 followup: Remove completely unused variable 'chromeParent' introduced in cf276949f2b6, to fix unused variable build warning. (trivial patch, no review)

content/base/src/nsMixedContentBlocker.cpp

@@ -377,7 +377,6 @@ nsMixedContentBlocker::ShouldLoad(uint32_t aContentType,
   if (aContentType == TYPE_SUBDOCUMENT && !rootHasSecureConnection) {
 
     bool httpsParentExists = false;
-    bool chromeParent = false;
 
     nsCOMPtr<nsIDocShellTreeItem> parentTreeItem;
     parentTreeItem = docShell;