Show a warning when using sync xhr.

Source/core/dom/Document.h

Index: Source/core/dom/Document.h
diff --git a/Source/core/dom/Document.h b/Source/core/dom/Document.h
index dc9f9faa7a925e9274be4954385f38444b20b0ed..f1aa70a6cea3bc74dc1a69a635f44aff98971c3b 100644
--- a/Source/core/dom/Document.h
+++ b/Source/core/dom/Document.h
@@ -900,6 +900,7 @@ public:
     bool processingLoadEvent() const { return m_loadEventProgress == LoadEventInProgress; }
     bool loadEventFinished() const { return m_loadEventProgress >= LoadEventCompleted; }
     bool unloadStarted() const { return m_loadEventProgress >= PageHideInProgress; }
+    bool processingBeforeUnload() const { return m_loadEventProgress == BeforeUnloadEventInProgress; }

[kouhei (in TOK), 2014/10/07 23:21:18]

Please don't add a new one. I think we can use !unloadStarted() instead?

[Mayur Kankanwadi, 2014/10/08 10:14:24]

unloadStarted even includes PageHideInProgress, which will be processing
pagehide event. We want to handle beforeunload only. Hence the new function was
added to specifically handle beforeunload event.

[kouhei (in TOK), 2014/10/09 06:45:46]

Acknowledged.

 
     void setContainsPlugins() { m_containsPlugins = true; }
     bool containsPlugins() const { return m_containsPlugins; }