Add autofill preview support for Textarea

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 751d378a598c150e50b68a2da65b0f1be8d6dcca..f4e0b16580751e6440f34434c307f9d534997ebe 100644
--- a/Source/core/html/HTMLTextAreaElement.cpp
+++ b/Source/core/html/HTMLTextAreaElement.cpp
@@ -433,6 +433,20 @@ void HTMLTextAreaElement::setMaxLength(int newValue, ExceptionState& exceptionSt
         setIntegralAttribute(maxlengthAttr, newValue);
 }
 
+const String& HTMLTextAreaElement::suggestedValue() const
+{
+    return m_suggestedValue;
+}
+
+void HTMLTextAreaElement::setSuggestedValue(const String& value)
+{
+    m_suggestedValue = value;
+    setInnerTextValue(m_suggestedValue);

[Ilya Sherman, 2013/12/29 03:15:08]

I'm wondering whether you need more of HTMLTextAreaElement::setValueCommon()
here.  In particular, why isn't updatePlaceholderVisibility(false); needed?

+    setNeedsStyleRecalc();
+    setFormControlValueMatchesRenderer(true);
+}
+
+

[Ilya Sherman, 2013/12/29 03:15:08]

nit: Please remove the second blank line -- there should only be a single blank
line between methods.

 String HTMLTextAreaElement::validationMessage() const
 {
     if (!willValidate())