[Mac] Convert Omnibox paste-and-go to use AutocompleteTextFieldObserver.

chrome/browser/cocoa/autocomplete_text_field.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_COCOA_AUTOCOMPLETE_TEXT_FIELD_H_
 #define CHROME_BROWSER_COCOA_AUTOCOMPLETE_TEXT_FIELD_H_
 
 #import <Cocoa/Cocoa.h>
 
 @class AutocompleteTextFieldCell;
@@ skipping 17 matching lines @@
 
 class AutocompleteTextFieldObserver {
  public:
 
   // Called when the control-key state changes while the field is
   // first responder.
   virtual void OnControlKeyChanged(bool pressed) = 0;
 
   // Called when the user pastes into the field.
   virtual void OnPaste() = 0;
+
+  // Returns true if the current clipboard text supports paste and go
+  // (or paste and search).
+  virtual bool CanPasteAndGo() = 0;
+
+  // Returns the appropriate "Paste and Go" or "Paste and Search"
+  // context menu string, depending on what is currently in the
+  // clipboard.  Must not be called unless CanPasteAndGo() returns
+  // true.
+  virtual int GetPasteActionStringId() = 0;
+
+  // Called when the user initiates a "paste and go" or "paste and
+  // search" into |field_|.
+  virtual void OnPasteAndGo() = 0;
 };
 
-@protocol AutocompleteTextFieldDelegateMethods
-// Returns nil if paste actions are not supported.
-- (NSString*)control:(NSControl*)control
-             textPasteActionString:(NSText*)fieldEditor;
-- (void)control:(NSControl*)control textDidPasteAndGo:(NSText*)fieldEditor;
-@end
-
 @interface AutocompleteTextField : NSTextField {
  @private
   AutocompleteTextFieldObserver* observer_;  // weak, owned by location bar.
 }
 
 @property AutocompleteTextFieldObserver* observer;
 
 // Convenience method to return the cell, casted appropriately.
 - (AutocompleteTextFieldCell*)autocompleteTextFieldCell;
 
 // If the keyword, keyword hint, or search hint changed, then the
 // field needs to be relaidout.  This accomplishes that in a manner
 // which doesn't disrupt the field delegate.
 - (void)resetFieldEditorFrameIfNeeded;
 
 @end
 
 #endif  // CHROME_BROWSER_COCOA_AUTOCOMPLETE_TEXT_FIELD_H_