Stop throwing DOM exceptions in internal 'XMLHttpRequest' response getters.

Source/core/xml/XMLHttpRequest.h

Index: Source/core/xml/XMLHttpRequest.h
diff --git a/Source/core/xml/XMLHttpRequest.h b/Source/core/xml/XMLHttpRequest.h
index fde3a84be50dc828ba69a830a38d5149ddbab9f5..a4316f1cdbe2d7954f81735a88fbb02f9bc5c82a 100644
--- a/Source/core/xml/XMLHttpRequest.h
+++ b/Source/core/xml/XMLHttpRequest.h
@@ -108,7 +108,7 @@ public:
     String getResponseHeader(const AtomicString& name, ExceptionState&) const;
     ScriptString responseText(ExceptionState&);
     Document* responseXML(ExceptionState&);
-    Blob* responseBlob(ExceptionState&);
+    Blob* responseBlob();
     unsigned long timeout() const { return m_timeoutMilliseconds; }
     void setTimeout(unsigned long timeout, ExceptionState&);
 
@@ -124,7 +124,7 @@ public:
     ResponseTypeCode responseTypeCode() const { return m_responseTypeCode; }
 
     // response attribute has custom getter.
-    ArrayBuffer* responseArrayBuffer(ExceptionState&);
+    ArrayBuffer* responseArrayBuffer();
 
     void setLastSendLineNumber(unsigned lineNumber) { m_lastSendLineNumber = lineNumber; }
     void setLastSendURL(const String& url) { m_lastSendURL = url; }