A quick fix for Issue 18353....

webkit/glue/webview_impl.cc

 /*
 * Copyright 2007 Google Inc. All Rights Reserved.
 *
 * Portions Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
 *
 * ***** BEGIN LICENSE BLOCK *****
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
@@ skipping 675 matching lines @@
     // deletion.
     autocomplete_popup_client_->RemoveItemAtIndex(selected_index);
     RefreshAutofillPopup();
     return false;
   }
 
   if (!autocomplete_popup_->isInterestedInEventForKey(event.windowsKeyCode))
     return false;
 
   if (autocomplete_popup_->handleKeyEvent(MakePlatformKeyboardEvent(event))) {
-#if defined(OS_WIN) || defined(OS_LINUX)
       // We need to ignore the next Char event after this otherwise pressing
       // enter when selecting an item in the menu will go to the page.
       if (WebInputEvent::RawKeyDown == event.type)
         suppress_next_keypress_event_ = true;
-#endif
       return true;
     }
 
   return false;
 }
 
 bool WebViewImpl::CharEvent(const WebKeyboardEvent& event) {
   DCHECK(event.type == WebInputEvent::Char);
 
   // Please refer to the comments explaining the suppress_next_keypress_event_
@@ skipping 117 matching lines @@
   switch (event.type) {
     case WebInputEvent::Char: {
       if (event.windowsKeyCode == VKEY_SPACE) {
         int key_code = ((event.modifiers & WebInputEvent::ShiftKey) ?
                          VKEY_PRIOR : VKEY_NEXT);
         return ScrollViewWithKeyboard(key_code);
       }
       break;
     }
 
-#if defined(OS_WIN) || defined(OS_LINUX)
     case WebInputEvent::RawKeyDown: {
-#else
-    case WebInputEvent::KeyDown: {
-#endif
       if (event.modifiers == WebInputEvent::ControlKey) {
         switch (event.windowsKeyCode) {
           case 'A':
             GetFocusedFrame()->SelectAll();
             return true;
           case VKEY_INSERT:
           case 'C':
             GetFocusedFrame()->Copy();
             return true;
           // Match FF behavior in the sense that Ctrl+home/end are the only Ctrl
@@ skipping 1112 matching lines @@
 
   return document->focusedNode();
 }
 
 HitTestResult WebViewImpl::HitTestResultForWindowPos(const IntPoint& pos) {
   IntPoint doc_point(
       page_->mainFrame()->view()->windowToContents(pos));
   return page_->mainFrame()->eventHandler()->
       hitTestResultAtPoint(doc_point, false);
 }