Bug 499447. Don't restart our interrupted reflow until some time passes, to give system event processing a fair shot. r=bzbarsky

layout/base/nsPresShell.cpp

@@ -7218,7 +7218,7 @@ PresShell::PostReflowEventOffTimer()
     mReflowContinueTimer = do_CreateInstance("@mozilla.org/timer;1");
     if (!mReflowContinueTimer ||
         NS_FAILED(mReflowContinueTimer->
-                    InitWithFuncCallback(sReflowContinueCallback, this, 0,
+                    InitWithFuncCallback(sReflowContinueCallback, this, 30,
                                          nsITimer::TYPE_ONE_SHOT))) {
       return PR_FALSE;
     }