Port autocomplete_edit_view_browsertest.cc to Mac.

chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.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.
 
 #import "chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.h"
 
 #include "base/string_util.h"
 #include "grit/generated_resources.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"  // IDC_*
@@ skipping 290 matching lines @@
   // We're only interested in selection changes directly caused by keyboard
   // input from the user.
   if (interpretingKeyEvents_)
     textChangedByKeyEvents_ = YES;
 }
 
 - (void)interpretKeyEvents:(NSArray *)eventArray {
   DCHECK(!interpretingKeyEvents_);
   interpretingKeyEvents_ = YES;
   textChangedByKeyEvents_ = NO;
+  AutocompleteTextFieldObserver* observer = [self observer];
+
+  if (observer)
+    observer->OnBeforeChange();
+
   [super interpretKeyEvents:eventArray];
 
-  AutocompleteTextFieldObserver* observer = [self observer];
   if (textChangedByKeyEvents_ && observer)
     observer->OnDidChange();
 
   DCHECK(interpretingKeyEvents_);
   interpretingKeyEvents_ = NO;
 }
 
+- (BOOL)shouldChangeTextInRange:(NSRange)affectedCharRange
+              replacementString:(NSString *)replacementString {
+  BOOL ret = [super shouldChangeTextInRange:affectedCharRange
+                          replacementString:replacementString];
+
+  if (ret && !interpretingKeyEvents_) {
+    AutocompleteTextFieldObserver* observer = [self observer];
+    if (observer)
+      observer->OnBeforeChange();
+  }
+  return ret;
+}
+
 - (void)didChangeText {
   [super didChangeText];
 
   AutocompleteTextFieldObserver* observer = [self observer];
   if (observer) {
     if (!interpretingKeyEvents_)
       observer->OnDidChange();
     else
       textChangedByKeyEvents_ = YES;
   }
@@ skipping 40 matching lines @@
 - (void)mouseDown:(NSEvent*)theEvent {
   // Close the popup before processing the event.
   AutocompleteTextFieldObserver* observer = [self observer];
   if (observer)
     observer->ClosePopup();
 
   [super mouseDown:theEvent];
 }
 
 @end