Port autocomplete_edit_view_browsertest.cc to Mac.

chrome/browser/autocomplete/autocomplete_edit_view_mac.mm

 // Copyright (c) 2010 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.
 
 #include "chrome/browser/autocomplete/autocomplete_edit_view_mac.h"
 
 #include <Carbon/Carbon.h>  // kVK_Return
 
 #include "app/mac/nsimage_cache.h"
 #include "base/string_util.h"
@@ skipping 728 matching lines @@
   return 0;
 }
 
 bool AutocompleteEditViewMac::IsImeComposing() const {
   return [(NSTextView*)[field_ currentEditor] hasMarkedText];
 }
 
 void AutocompleteEditViewMac::OnDidBeginEditing() {
   // We should only arrive here when the field is focussed.
   DCHECK([field_ currentEditor]);
+}
 
+void AutocompleteEditViewMac::OnBeforeChange() {
   // Capture the current state.
   OnBeforePossibleChange();
 }
 
 void AutocompleteEditViewMac::OnDidChange() {
   // Figure out what changed and notify the model_.
   OnAfterPossibleChange();
-
-  // Then capture the new state.
-  OnBeforePossibleChange();
 }
 
 void AutocompleteEditViewMac::OnDidEndEditing() {
   ClosePopup();
 }
 
 bool AutocompleteEditViewMac::OnDoCommandBySelector(SEL cmd) {
   // We should only arrive here when the field is focussed.
   DCHECK(IsFirstResponder());
 
@@ skipping 110 matching lines @@
   if (cmd == @selector(deleteForward:)) {
     const NSUInteger modifiers = [[NSApp currentEvent] modifierFlags];
     if ((modifiers & NSShiftKeyMask) != 0) {
       if (model_->popup_model()->IsOpen()) {
         model_->popup_model()->TryDeletingCurrentItem();
         return true;
       }
     }
   }
 
-  // Capture the state before the operation changes the content.
-  // TODO(shess): Determine if this is always redundent WRT the call
-  // in -controlTextDidChange:.
-  OnBeforePossibleChange();
   return false;
 }
 
 void AutocompleteEditViewMac::OnSetFocus(bool control_down) {
   model_->OnSetFocus(control_down);
   controller_->OnSetFocus();
 }
 
 void AutocompleteEditViewMac::OnKillFocus() {
   // Tell the model to reset itself.
@@ skipping 213 matching lines @@
 
 void AutocompleteEditViewMac::PlaceCaretAt(NSUInteger pos) {
   DCHECK(pos <= GetTextLength());
   SetSelectedRange(NSMakeRange(pos, pos));
 }
 
 bool AutocompleteEditViewMac::IsCaretAtEnd() const {
   const NSRange selection = GetSelectedRange();
   return selection.length == 0 && selection.location == GetTextLength();
 }