Add text field change handling for autofill preview in textarea element.

Source/core/page/ChromeClient.h

Index: Source/core/page/ChromeClient.h
diff --git a/Source/core/page/ChromeClient.h b/Source/core/page/ChromeClient.h
index 969e213af34c820a9038bf8de5129bd4c6cacacf..c0ef7caae773e68cba72ed7353d61255bd931367 100644
--- a/Source/core/page/ChromeClient.h
+++ b/Source/core/page/ChromeClient.h
@@ -60,6 +60,7 @@ class LocalFrame;
 class GraphicsLayer;
 class GraphicsLayerFactory;
 class HitTestResult;
+class HTMLFormControlElement;
 class HTMLInputElement;
 class IntRect;
 class Node;
@@ -242,7 +243,10 @@ public:
     virtual bool isChromeClientImpl() const { return false; }
 
     virtual void didAssociateFormControls(const Vector<RefPtr<Element> >&) { };
+    // FIXME: This function is to be removed once both chromium and blink changes
+    // for BUG332557 are in.
     virtual void didChangeValueInTextField(HTMLInputElement&) { }
+    virtual void didChangeValueInTextField(HTMLFormControlElement&) { }
     virtual void didEndEditingOnTextField(HTMLInputElement&) { }
     virtual void handleKeyboardEventOnTextField(HTMLInputElement&, KeyboardEvent&) { }