[Mac] Fix Option-return in Omnibox.

chrome/browser/autocomplete/autocomplete_edit_view_mac.mm

 // 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.
 
 #include "chrome/browser/autocomplete/autocomplete_edit_view_mac.h"
 
 #include <Carbon/Carbon.h>  // kVK_Return
 #include "app/gfx/font.h"
 #include "app/resource_bundle.h"
 #include "base/clipboard.h"
@@ skipping 739 matching lines @@
     edit_view_->OnEscapeKeyPressed();
     return YES;
   }
 
   if (cmd == @selector(insertTab:)) {
     if (edit_view_->OnTabPressed()) {
       return YES;
     }
   }
 
+  // TODO(shess): Option-tab, would normally insert a literal tab
+  // character.  Consider combining with -insertTab:
+  if (cmd == @selector(insertTabIgnoringFieldEditor:)) {
+    return YES;
+  }
+
   // |-noop:| is sent when the user presses Cmd+Return. Override the no-op
   // behavior with the proper WindowOpenDisposition.
   NSEvent* event = [NSApp currentEvent];
   if (cmd == @selector(insertNewline:) ||
      (cmd == @selector(noop:) && [event keyCode] == kVK_Return)) {
     WindowOpenDisposition disposition =
         event_utils::WindowOpenDispositionFromNSEvent(event);
     edit_view_->AcceptInput(disposition, false);
     return YES;
   }
 
+  // TODO(shess): Option-return, would normally insert a literal
+  // newline.  Consider combining with -insertNewline:.
+  if (cmd == @selector(insertNewlineIgnoringFieldEditor:)) {
+    return YES;
+  }
+
   // When the user does Control-Enter, the existing content has "www."
   // prepended and ".com" appended.  |model_| should already have
   // received notification when the Control key was depressed, but it
   // is safe to tell it twice.
   if (cmd == @selector(insertLineBreak:)) {
     edit_view_->OnControlKeyChanged(true);
     WindowOpenDisposition disposition =
         event_utils::WindowOpenDispositionFromNSEvent([NSApp currentEvent]);
     edit_view_->AcceptInput(disposition, false);
     return YES;
@@ skipping 64 matching lines @@
 // prepended and ".com" appended.  This calls down to
 // AutocompleteEditModel::OnControlKeyChanged() so that it can change
 // the popup to reflect this.  See autocomplete_edit.cc
 // OnControlKeyChanged() and OnAfterPossibleChange().
 - (void)control:(NSControl*)control flagsChanged:(NSEvent*)theEvent {
   BOOL controlFlag = ([theEvent modifierFlags]&NSControlKeyMask) != 0;
   edit_view_->OnControlKeyChanged(controlFlag);
 }
 
 @end