Merge 107170 - DOM mutations should not be delivered on worker threads

Source/WebCore/bindings/v8/V8RecursionScope.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "V8RecursionScope.h"
 
 #include "IDBPendingTransactionMonitor.h"
+#include "ScriptExecutionContext.h"
 #include "WebKitMutationObserver.h"
 
 namespace WebCore {
 
-void V8RecursionScope::didLeaveScriptContext()
+void V8RecursionScope::didLeaveScriptContext(ScriptExecutionContext* context)
 {
     // FIXME: Instrument any work that takes place when script exits to c++ (e.g. Mutation Observers).
 
 #if ENABLE(INDEXED_DATABASE)
     // If we've just left a script context and indexed database has been
     // instantiated, we must let its transaction coordinator know so it can terminate
     // any not-yet-started transactions.
     IDBPendingTransactionMonitor::abortPendingTransactions();
 #endif
 
 #if ENABLE(MUTATION_OBSERVERS)
-    WebKitMutationObserver::deliverAllMutations();
+    if (context && context->isDocument())
+        WebKitMutationObserver::deliverAllMutations();
 #endif
 }
 
 } // namespace WebCore