Allow sites to enable 'window.onerror' handlers for cross-domain scripts.

Source/core/dom/ScriptExecutionContext.h

Index: Source/core/dom/ScriptExecutionContext.h
diff --git a/Source/core/dom/ScriptExecutionContext.h b/Source/core/dom/ScriptExecutionContext.h
index 3ac45c67ce98daf29393a748ae6a106fb1285baa..48ce77dd9279eeecfa1706dca3c542792f93fbdb 100644
--- a/Source/core/dom/ScriptExecutionContext.h
+++ b/Source/core/dom/ScriptExecutionContext.h
@@ -69,8 +69,8 @@ public:
 
     virtual void disableEval(const String& errorMessage) = 0;
 
-    bool sanitizeScriptError(String& errorMessage, int& lineNumber, int& columnNumber, String& sourceURL, CachedScript* = 0);
-    void reportException(const String& errorMessage, int lineNumber, int columnNumber, const String& sourceURL, PassRefPtr<ScriptCallStack>, CachedScript* = 0);
+    bool sanitizeScriptError(String& errorMessage, int& lineNumber, int& columnNumber, String& sourceURL);
+    void reportException(const String& errorMessage, int lineNumber, int columnNumber, const String& sourceURL, PassRefPtr<ScriptCallStack>);
 
     void addConsoleMessage(MessageSource, MessageLevel, const String& message, const String& sourceURL, unsigned lineNumber, ScriptState* = 0, unsigned long requestIdentifier = 0);
     virtual void addConsoleMessage(MessageSource, MessageLevel, const String& message, unsigned long requestIdentifier = 0) = 0;
@@ -126,6 +126,9 @@ public:
 
     void setDatabaseContext(DatabaseContext*);
 
+    void didLoadScriptThatPassedAccessControlCheck(const KURL&);
+    bool scriptPassedAccessControlCheck(const KURL&) const;
+
 protected:
     class AddConsoleMessageTask : public Task {
     public:
@@ -157,7 +160,7 @@ private:
     virtual void addMessage(MessageSource, MessageLevel, const String& message, const String& sourceURL, unsigned lineNumber, PassRefPtr<ScriptCallStack>, ScriptState* = 0, unsigned long requestIdentifier = 0) = 0;
     virtual EventTarget* errorEventTarget() = 0;
     virtual void logExceptionToConsole(const String& errorMessage, const String& sourceURL, int lineNumber, int columnNumber, PassRefPtr<ScriptCallStack>) = 0;
-    bool dispatchErrorEvent(const String& errorMessage, int lineNumber, int columnNumber, const String& sourceURL, CachedScript*);
+    bool dispatchErrorEvent(const String& errorMessage, int lineNumber, int columnNumber, const String& sourceURL);
 
     void closeMessagePorts();
 
@@ -171,6 +174,8 @@ private:
 
     HashSet<MessagePort*> m_messagePorts;
 
+    HashSet<unsigned> m_scriptsPassingAccessControlCheck;
+
     int m_circularSequentialID;
     typedef HashMap<int, OwnPtr<DOMTimer> > TimeoutMap;
     TimeoutMap m_timeouts;