Add supports that allow Autofill to be initiated from textarea field

components/autofill/content/renderer/page_click_listener.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_AUTOFILL_CONTENT_RENDERER_PAGE_CLICK_LISTENER_H_
 #define COMPONENTS_AUTOFILL_CONTENT_RENDERER_PAGE_CLICK_LISTENER_H_
 
 namespace blink {
-class WebInputElement;
+class WebFormControlElement;
 }
 
 namespace autofill {
 
 // Interface that should be implemented by classes interested in getting
 // notifications for clicks on a page.
 // Register on the PageListenerTracker object.
 class PageClickListener {
  public:
   // Notification that |element| was clicked.
   // |was_focused| is true if |element| had focus BEFORE the click.
   // |is_focused| is true if |element| has focus AFTER the click was processed.
-  virtual void InputElementClicked(const blink::WebInputElement& element,
-                                   bool was_focused,
-                                   bool is_focused) = 0;
+  virtual void FormControlElementClicked(
+      const blink::WebFormControlElement& element,
+      bool was_focused) = 0;
 
-  // If the previously focused element was an input field, listeners are
-  // informed that the text field has lost its focus.
-  virtual void InputElementLostFocus() = 0;
+  // If the previously focused element was an input field or a textarea field,

[Ilya Sherman, 2014/02/26 00:12:07]

nit: "textarea field" -> "textarea"

[ziran.sun, 2014/02/26 18:11:50]

Done.

+  // listeners are informed that the text field has lost its focus.
+  virtual void FormControlElementLostFocus() = 0;
 
  protected:
   virtual ~PageClickListener() {}
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CONTENT_RENDERER_PAGE_CLICK_LISTENER_H_