Only Microtask::performCheckpoint() if recursionLevel is 0

Source/core/html/parser/HTMLScriptRunner.cpp

Index: Source/core/html/parser/HTMLScriptRunner.cpp
diff --git a/Source/core/html/parser/HTMLScriptRunner.cpp b/Source/core/html/parser/HTMLScriptRunner.cpp
index 3e3a7d0153da82f4e64dfb516d19bfc712fa8eb5..cae46322aaa19d0b87b708f4303a553c758b650e 100644
--- a/Source/core/html/parser/HTMLScriptRunner.cpp
+++ b/Source/core/html/parser/HTMLScriptRunner.cpp
@@ -27,6 +27,7 @@
 #include "core/html/parser/HTMLScriptRunner.h"
 
 #include "bindings/v8/ScriptSourceCode.h"
+#include "bindings/v8/V8PerIsolateData.h"

[adamk, 2014/03/20 21:58:47]

This seems a bit wrong to include here, but this is the ScriptRunner so i'm not
too offended...

 #include "core/dom/Element.h"
 #include "core/events/Event.h"
 #include "core/dom/IgnoreDestructiveWriteCountIncrementer.h"
@@ -126,7 +127,9 @@ void HTMLScriptRunner::executePendingScriptAndDispatchEvent(PendingScript& pendi
         stopWatchingForLoad(pendingScript);
 
     if (!isExecutingScript()) {
-        Microtask::performCheckpoint();
+        if (!V8PerIsolateData::current()->recursionLevel())
+            Microtask::performCheckpoint();
+
         m_hasScriptsWaitingForResources = !m_document->haveStylesheetsAndImportsLoaded();
         if (m_hasScriptsWaitingForResources)
             return;
@@ -292,7 +295,7 @@ void HTMLScriptRunner::runScript(Element* script, const TextPosition& scriptStar
 
         ASSERT(scriptLoader->isParserInserted());
 
-        if (!isExecutingScript())
+        if (!isExecutingScript() && !V8PerIsolateData::current()->recursionLevel())
             Microtask::performCheckpoint();
 
         InsertionPointRecord insertionPointRecord(m_host->inputStream());