Implement HTMLElement directionality according to the spec

Source/core/html/HTMLElement.cpp

Index: Source/core/html/HTMLElement.cpp
diff --git a/Source/core/html/HTMLElement.cpp b/Source/core/html/HTMLElement.cpp
index f9dff426403e18215fdd92b3f3597386140f0978..445382ac9026dc4739efd221cd7ada7f6a4e9b86 100644
--- a/Source/core/html/HTMLElement.cpp
+++ b/Source/core/html/HTMLElement.cpp
@@ -50,6 +50,7 @@
 #include "core/html/HTMLInputElement.h"
 #include "core/html/HTMLMenuElement.h"
 #include "core/html/HTMLTemplateElement.h"
+#include "core/html/HTMLTextAreaElement.h"
 #include "core/html/HTMLTextFormControlElement.h"
 #include "core/html/parser/HTMLParserIdioms.h"
 #include "core/rendering/RenderObject.h"
@@ -687,10 +688,20 @@ TextDirection HTMLElement::directionality(Node** strongDirectionalityTextNode) c
 {
     if (isHTMLInputElement(*this)) {
         HTMLInputElement* inputElement = toHTMLInputElement(const_cast<HTMLElement*>(this));
+        if (inputElement->isTextField() || inputElement->isSearchField()
+            || inputElement->isURLField() || inputElement->isEmailField()) {
+            bool hasStrongDirectionality;
+            TextDirection textDirection = determineDirectionality(inputElement->value(), hasStrongDirectionality);
+            if (strongDirectionalityTextNode)
+                *strongDirectionalityTextNode = hasStrongDirectionality ? inputElement : 0;
+            return textDirection;
+        }
+    } else if (isHTMLTextAreaElement(*this)) {
+        HTMLTextAreaElement* textAreaElement = toHTMLTextAreaElement(const_cast<HTMLElement*>(this));
         bool hasStrongDirectionality;
-        TextDirection textDirection = determineDirectionality(inputElement->value(), hasStrongDirectionality);
+        TextDirection textDirection = determineDirectionality(textAreaElement->value(), hasStrongDirectionality);
         if (strongDirectionalityTextNode)
-            *strongDirectionalityTextNode = hasStrongDirectionality ? inputElement : 0;
+            *strongDirectionalityTextNode = hasStrongDirectionality ? textAreaElement : 0;
         return textDirection;
     }