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

Source/web/ChromeClientImpl.cpp

Index: Source/web/ChromeClientImpl.cpp
diff --git a/Source/web/ChromeClientImpl.cpp b/Source/web/ChromeClientImpl.cpp
index 6df23221b636684f7d0f23f62d5cfaec6edd172d..d46e1a1faf7815bcfb8629b703934476ef78689a 100644
--- a/Source/web/ChromeClientImpl.cpp
+++ b/Source/web/ChromeClientImpl.cpp
@@ -903,6 +903,8 @@ void ChromeClientImpl::forwardInputEvent(
     }
 }
 
+// FIXME: This function is to be removed once both chromium and blink changes
+// for BUG332557 are in.
 void ChromeClientImpl::didChangeValueInTextField(HTMLInputElement& inputElement)
 {
     if (!m_webView->autofillClient())
@@ -910,6 +912,13 @@ void ChromeClientImpl::didChangeValueInTextField(HTMLInputElement& inputElement)
     m_webView->autofillClient()->textFieldDidChange(WebInputElement(&inputElement));
 }
 
+void ChromeClientImpl::didChangeValueInTextField(HTMLFormControlElement& element)
+{
+    if (!m_webView->autofillClient())
+        return;
+    m_webView->autofillClient()->textFieldDidChange(WebFormControlElement(&element));
+}
+
 void ChromeClientImpl::didEndEditingOnTextField(HTMLInputElement& inputElement)
 {
     if (m_webView->autofillClient())