Add supports that allow Autofill to be initiated from textarea field

components/autofill/content/renderer/autofill_agent.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_AUTOFILL_AGENT_H_
 #define COMPONENTS_AUTOFILL_CONTENT_RENDERER_AUTOFILL_AGENT_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "components/autofill/content/renderer/form_cache.h"
 #include "components/autofill/content/renderer/page_click_listener.h"
 #include "components/autofill/core/common/forms_seen_state.h"
 #include "content/public/renderer/render_view_observer.h"
 #include "third_party/WebKit/public/web/WebAutofillClient.h"
+#include "third_party/WebKit/public/web/WebFormControlElement.h"
 #include "third_party/WebKit/public/web/WebFormElement.h"
 #include "third_party/WebKit/public/web/WebInputElement.h"
+#include "third_party/WebKit/public/web/WebTextAreaElement.h"
 
 namespace blink {
 class WebNode;
 class WebView;
 }
 
 namespace autofill {
 
 struct FormData;
 struct FormFieldData;
@@ skipping 35 matching lines @@
                                         bool is_new_navigation) OVERRIDE;
   virtual void FrameDetached(blink::WebFrame* frame) OVERRIDE;
   virtual void WillSubmitForm(blink::WebFrame* frame,
                               const blink::WebFormElement& form) OVERRIDE;
   virtual void ZoomLevelChanged() OVERRIDE;
   virtual void DidChangeScrollOffset(blink::WebFrame* frame) OVERRIDE;
   virtual void FocusedNodeChanged(const blink::WebNode& node) OVERRIDE;
   virtual void OrientationChangeEvent(int orientation) OVERRIDE;
 
   // PageClickListener:
-  virtual void InputElementClicked(const blink::WebInputElement& element,
-                                   bool was_focused,
-                                   bool is_focused) OVERRIDE;
-  virtual void InputElementLostFocus() OVERRIDE;
+  virtual void FormControlElementClicked(
+      const blink::WebFormControlElement& element,
+      bool was_focused,
+      bool is_focused) OVERRIDE;
+  virtual void FormControlElementLostFocus() OVERRIDE;
 
   // blink::WebAutofillClient:
   virtual void textFieldDidEndEditing(
       const blink::WebInputElement& element) OVERRIDE;
+  // TODO: To be removed once next Blink roll is done

[Ilya Sherman, 2014/02/22 06:24:20]

nit: TODO's should be formatted as "TODO(ziran.sun):".  Ditto below.  Though, in
this case, I thought the necessary Blink CL had already landed, right?  If so,
let's just go ahead and address these TODOs now.

[ziran.sun, 2014/02/25 16:10:03]

textFieldDidChange() change is not in yet. More changes have also been added 
today to be in line with the code updates in Chromium side.
https://codereview.chromium.org/133443011/

   virtual void textFieldDidChange(
-      const blink::WebInputElement& element) OVERRIDE;
+      const blink::WebInputElement& element);
+  // TODO: OVERRIDE this function once next Blink roll is done
+  virtual void textFieldDidChange(
+      const blink::WebFormControlElement& element);
   virtual void textFieldDidReceiveKeyDown(
       const blink::WebInputElement& element,
       const blink::WebKeyboardEvent& event) OVERRIDE;
   virtual void didRequestAutocomplete(
       blink::WebFrame* frame,
       const blink::WebFormElement& form) OVERRIDE;
   virtual void setIgnoreTextChanges(bool ignore) OVERRIDE;
   virtual void didAssociateFormControls(
       const blink::WebVector<blink::WebNode>& nodes) OVERRIDE;
   virtual void openTextDataListChooser(const blink::WebInputElement& element);
@@ skipping 19 matching lines @@
   // Called when an autocomplete request succeeds or fails with the |result|.
   void FinishAutocompleteRequest(
       blink::WebFormElement::AutocompleteResult result);
 
   // Called when the page is actually shown in the browser, as opposed to simply
   // being preloaded.
   void OnPageShown();
 
   // Called in a posted task by textFieldDidChange() to work-around a WebKit bug
   // http://bugs.webkit.org/show_bug.cgi?id=16976
-  void TextFieldDidChangeImpl(const blink::WebInputElement& element);
+  void TextFieldDidChangeImpl(const blink::WebFormControlElement& element);
 
   // Shows the autofill suggestions for |element|.
   // This call is asynchronous and may or may not lead to the showing of a
   // suggestion popup (no popup is shown if there are no available suggestions).
   // |autofill_on_empty_values| specifies whether suggestions should be shown
   // when |element| contains no text.
   // |requires_caret_at_end| specifies whether suggestions should be shown when
   // the caret is not after the last character in |element|.
   // |display_warning_if_disabled| specifies whether a warning should be
   // displayed to the user if Autofill has suggestions available, but cannot
   // fill them because it is disabled (e.g. when trying to fill a credit card
   // form on a non-secure website).
   // |datalist_only| specifies whether all of <datalist> suggestions and no
   // autofill suggestions are shown. |autofill_on_empty_values| and
   // |requires_caret_at_end| are ignored if |datalist_only| is true.
-  void ShowSuggestions(const blink::WebInputElement& element,
+  void ShowSuggestions(const blink::WebFormControlElement& element,
                        bool autofill_on_empty_values,
                        bool requires_caret_at_end,
                        bool display_warning_if_disabled,
                        bool datalist_only);
 
   // Queries the browser for Autocomplete and Autofill suggestions for the given
   // |element|.
-  void QueryAutofillSuggestions(const blink::WebInputElement& element,
+  void QueryAutofillSuggestions(const blink::WebFormControlElement& element,
                                 bool display_warning_if_disabled,
                                 bool datalist_only);
 
   // Sets the element value to reflect the selected |suggested_value|.
   void AcceptDataListSuggestion(const base::string16& suggested_value);
 
   // Queries the AutofillManager for form data for the form containing |node|.
   // |value| is the current text in the field, and |unique_id| is the selected
   // profile's unique ID.  |action| specifies whether to Fill or Preview the
   // values returned from the AutofillManager.
@@ skipping 17 matching lines @@
   FormCache form_cache_;
 
   PasswordAutofillAgent* password_autofill_agent_;  // Weak reference.
   PasswordGenerationAgent* password_generation_agent_;  // Weak reference.
 
   // The ID of the last request sent for form field Autofill.  Used to ignore
   // out of date responses.
   int autofill_query_id_;
 
   // The element corresponding to the last request sent for form field Autofill.
-  blink::WebInputElement element_;
+  blink::WebFormControlElement element_;
 
   // The form element currently requesting an interactive autocomplete.
   blink::WebFormElement in_flight_request_form_;
 
   // All the form elements seen in the top frame.
   std::vector<blink::WebFormElement> form_elements_;
 
   // The action to take when receiving Autofill data from the AutofillManager.
   AutofillAction autofill_action_;
 
@@ skipping 38 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(
       PasswordAutofillAgentTest,
       PasswordAutofillTriggersOnChangeEventsWaitForUsername);
 
   DISALLOW_COPY_AND_ASSIGN(AutofillAgent);
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CONTENT_RENDERER_AUTOFILL_AGENT_H_