Fix keyword search erroneously not triggering in two obscure cases:

chrome/browser/ui/cocoa/omnibox/omnibox_view_mac.mm

 // Copyright (c) 2012 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/ui/cocoa/omnibox/omnibox_view_mac.h"
 
 #include <Carbon/Carbon.h>  // kVK_Return
 
 #include "base/property_bag.h"
 #include "base/string_util.h"
@@ skipping 678 matching lines @@
   // and other methods to provide positive knowledge that a delete
   // occured, rather than intuiting it from context.  Consider whether
   // that would be a stronger approach.
   const bool just_deleted_text =
       (length < text_before_change_.length() &&
        new_selection.location <= selection_before_change_.location);
 
   delete_at_end_pressed_ = false;
 
   const bool something_changed = model_->OnAfterPossibleChange(
-      new_text, new_selection.location, NSMaxRange(new_selection),
-      selection_differs, text_differs, just_deleted_text,
-      !IsImeComposing());
+      text_before_change_, new_text, new_selection.location,
+      NSMaxRange(new_selection), selection_differs, text_differs,
+      just_deleted_text, !IsImeComposing());
 
   if (delete_was_pressed_ && at_end_of_edit)
     delete_at_end_pressed_ = true;
 
   // Restyle in case the user changed something.
   // TODO(shess): I believe there are multiple-redraw cases, here.
   // Linux watches for something_changed && text_differs, but that
   // fails for us in case you copy the URL and paste the identical URL
   // back (we'll lose the styling).
   TextChanged();
@@ skipping 413 matching lines @@
 
 void OmniboxViewMac::PlaceCaretAt(NSUInteger pos) {
   DCHECK(pos <= GetTextLength());
   SetSelectedRange(NSMakeRange(pos, pos));
 }
 
 bool OmniboxViewMac::IsCaretAtEnd() const {
   const NSRange selection = GetSelectedRange();
   return selection.length == 0 && selection.location == GetTextLength();
 }