Revert of Fix update of validity cache value, so that it reflects the correct state of any ...

Source/core/html/HTMLTextAreaElement.cpp

Index: Source/core/html/HTMLTextAreaElement.cpp
diff --git a/Source/core/html/HTMLTextAreaElement.cpp b/Source/core/html/HTMLTextAreaElement.cpp
index 4fa3c87dd5f5116bd264863369052d26a9cd0fad..8480199a6472428e6aefb13aeb91361ec073a5cf 100644
--- a/Source/core/html/HTMLTextAreaElement.cpp
+++ b/Source/core/html/HTMLTextAreaElement.cpp
@@ -320,6 +320,7 @@
     if (m_valueIsUpToDate)
         return;
 
+    ASSERT(renderer());
     m_value = innerEditorValue();
     const_cast<HTMLTextAreaElement*>(this)->m_valueIsUpToDate = true;
     const_cast<HTMLTextAreaElement*>(this)->notifyFormStateChanged();