Implement UI automation on the Mac....

chrome/test/ui_test_utils_mac.cc

 // 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/test/ui_test_utils.h"
 
 #include "base/logging.h"
 
 namespace ui_test_utils {
 
+// Details on why these are unimplemented: ViewIDs are defined in
+// chrome/browser/view_ids.h.  For Cocoa (unlike Views GTK) we don't
+// associate ViewIDs with NSViews.
+//
+// Here's an idea on how to implement.
+// - associate the correct ViewID with an NSView on construction (the most work)
+// - create a mapping table, such as chrome/browser/gtk/view_id_util.h
+// - IsViewFocused() then becomes
+//    [browser->window()->GetNativeHandle() firstResponder]
+// - ClickOnView() becomes a normal NSMouseDown event forge at the right coords
+
 bool IsViewFocused(const Browser* browser, ViewID vid) {
   NOTIMPLEMENTED();
   return false;
 }
 
 void ClickOnView(const Browser* browser, ViewID vid) {
   NOTIMPLEMENTED();
 }
 
 }  // namespace ui_test_utils