86984 - make history.length sameOrigin-accessible. Security prefs change.

91714 - CheckLoadURI should trest 'safe' and 'unsafe' about: URLs as different protocols
56260 - 'Remember This Decision' in signed script grant dialog should default to unchecked
83131 - More descriptive security error messages
93951 - Added null check in GetBaseURIScheme to prevent crash.
All bugs r=jtaylor, sr=jst

content/base/src/nsXMLHttpRequest.cpp

@@ -710,15 +710,7 @@ nsXMLHttpRequest::Open(const char *method, const char *url)
     rv = secMan->CheckConnect(cx, targetURI, "XMLHttpRequest","open");
     if (NS_FAILED(rv))
     {
-      // Security check failed. The above call set a JS exception. The
-      // following lines ensure that the exception is propagated.
-
-      nsCOMPtr<nsIXPConnect> xpc(do_GetService(nsIXPConnect::GetCID(), &rv));
-      nsCOMPtr<nsIXPCNativeCallContext> cc;
-      if(NS_SUCCEEDED(rv))
-        xpc->GetCurrentNativeCallContext(getter_AddRefs(cc));
-      if (cc)
-        cc->SetExceptionWasThrown(PR_TRUE);
+      // Security check failed.
       return NS_OK;
     }