Enabling async reflow after the document has loaded.

layout/base/nsPresShell.cpp

@@ -801,7 +801,7 @@ PresShell::Init(nsIDocument* aDocument,
     // First, set the defaults
     gMaxRCProcessingTime = NS_MAX_REFLOW_TIME;
     gDoAsyncReflow = PR_FALSE;
-    gDoAsyncReflowAfterDocLoad = PR_FALSE;
+    gDoAsyncReflowAfterDocLoad = PR_TRUE;
 
     // Get the prefs service
     NS_WITH_SERVICE(nsIPref, prefs, kPrefServiceCID, &result);

layout/html/base/src/nsPresShell.cpp

@@ -801,7 +801,7 @@ PresShell::Init(nsIDocument* aDocument,
     // First, set the defaults
     gMaxRCProcessingTime = NS_MAX_REFLOW_TIME;
     gDoAsyncReflow = PR_FALSE;
-    gDoAsyncReflowAfterDocLoad = PR_FALSE;
+    gDoAsyncReflowAfterDocLoad = PR_TRUE;
 
     // Get the prefs service
     NS_WITH_SERVICE(nsIPref, prefs, kPrefServiceCID, &result);