Deal with frame removal by content scripts

third_party/WebKit/Source/core/loader/FrameLoader.cpp

Index: third_party/WebKit/Source/core/loader/FrameLoader.cpp
diff --git a/third_party/WebKit/Source/core/loader/FrameLoader.cpp b/third_party/WebKit/Source/core/loader/FrameLoader.cpp
index 038cf60a8afc2b21412fab348d49efb7f0661d53..0cdca1c3c84e30ce55f07372e1a07eae4bf2c06a 100644
--- a/third_party/WebKit/Source/core/loader/FrameLoader.cpp
+++ b/third_party/WebKit/Source/core/loader/FrameLoader.cpp
@@ -83,6 +83,7 @@
 #include "core/xml/parser/XMLDocumentParser.h"
 #include "platform/Logging.h"
 #include "platform/PluginScriptForbiddenScope.h"
+#include "platform/ScriptForbiddenScope.h"
 #include "platform/UserGestureIndicator.h"
 #include "platform/network/HTTPParsers.h"
 #include "platform/network/ResourceRequest.h"
@@ -488,8 +489,13 @@ void FrameLoader::finishedParsing()
 
     m_progressTracker->finishedParsing();
 
-    if (client())
+    if (client()) {
+        ScriptForbiddenScope forbidScripts;
         client()->dispatchDidFinishDocumentLoad(m_documentLoader ? m_documentLoader->isCommittedButEmpty() : true);
+    }
+
+    if (client())
+        client()->runScriptsAtDocumentReady();
 
     checkCompleted();
 
@@ -1485,9 +1491,16 @@ bool FrameLoader::shouldTreatURLAsSrcdocDocument(const KURL& url) const
 
 void FrameLoader::dispatchDocumentElementAvailable()
 {
+    ScriptForbiddenScope forbidScripts;
     client()->documentElementAvailable();
 }
 
+void FrameLoader::runScriptsAtDocumentElementAvailable()
+{
+    client()->runScriptsAtDocumentElementAvailable();
+    // The frame might be detached at this point.
+}
+
 void FrameLoader::dispatchDidClearDocumentOfWindowObject()
 {
     if (!m_frame->script().canExecuteScripts(NotAboutToExecuteScript))