Fix delete in Mac Omnibox.

chrome/browser/autocomplete/autocomplete_edit_view_mac.h

 // Copyright (c) 2009 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 CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_EDIT_VIEW_MAC_H_
 #define CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_EDIT_VIEW_MAC_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/basictypes.h"
@@ skipping 60 matching lines @@
   virtual void RevertAll();
   virtual void UpdatePopup();
   virtual void ClosePopup();
   void UpdateAndStyleText(const std::wstring& display_text,
                           size_t user_text_length);
   virtual void OnTemporaryTextMaybeChanged(const std::wstring& display_text,
                                            bool save_original_selection);
   virtual bool OnInlineAutocompleteTextMaybeChanged(
       const std::wstring& display_text, size_t user_text_length);
   virtual void OnRevertTemporaryText();
-  virtual void OnBeforePossibleChange() { NOTIMPLEMENTED(); }
-  virtual bool OnAfterPossibleChange() { NOTIMPLEMENTED(); return false; }
+  virtual void OnBeforePossibleChange();
+  virtual bool OnAfterPossibleChange();
 
   // Helper functions which forward to our private: model_.
   void OnUpOrDownKeyPressed(int dir);
   void OnEscapeKeyPressed();
   void OnSetFocus(bool f);
   void OnKillFocus();
   void AcceptInput(WindowOpenDisposition disposition, bool for_drop);
-  void OnAfterPossibleChange(const std::wstring& new_text,
-                             bool selection_differs,
-                             bool text_differs,
-                             bool just_deleted_text,
-                             bool at_end_of_edit);
 
   // TODO(shess): Get rid of this.  Right now it's needed because of
   // the ordering of initialization in tab_contents_controller.mm.
   void SetField(NSTextField* field);
 
   // Helper for LocationBarBridge.
   void FocusLocation();
 
  private:
+  // Returns the field's currently selected range.  Only valid if the
+  // field has focus.
+  NSRange GetSelectedRange() const;
+
   scoped_ptr<AutocompleteEditModel> model_;
   scoped_ptr<AutocompletePopupViewMac> popup_view_;
 
   AutocompleteEditController* controller_;
   ToolbarModel* toolbar_model_;
 
   // The object that handles additional command functionality exposed on the
   // edit, such as invoking the keyword editor.
   CommandUpdater* command_updater_;
 
   NSTextField* field_;  // owned by tab controller
 
   // Objective-C object to bridge field_ delegate calls to C++.
   scoped_nsobject<AutocompleteEditHelper> edit_helper_;
 
   std::wstring saved_temporary_text_;
 
+  // Tracking state before and after a possible change for reporting
+  // to model_.
+  NSRange selection_before_change_;
+  std::wstring text_before_change_;
+
   DISALLOW_COPY_AND_ASSIGN(AutocompleteEditViewMac);
 };
 
 #endif  // CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_EDIT_VIEW_MAC_H_