Cocoa: Support keyboard navigation in avatar menu

ui/base/test/cocoa_test_event_utils.mm

 // Copyright (c) 2011 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 <Cocoa/Cocoa.h>
 
 #include "ui/base/test/cocoa_test_event_utils.h"
 
 ScopedClassSwizzler::ScopedClassSwizzler(Class target, Class source,
                                          SEL selector) {
@@ skipping 65 matching lines @@
                                               NSUInteger clickCount) {
   const NSRect bounds = [view convertRect:[view bounds] toView:nil];
   const NSPoint mid_point = NSMakePoint(NSMidX(bounds), NSMidY(bounds));
   NSEvent* down = MouseEventAtPointInWindow(mid_point, NSLeftMouseDown,
                                             [view window], clickCount);
   NSEvent* up = MouseEventAtPointInWindow(mid_point, NSLeftMouseUp,
                                           [view window], clickCount);
   return std::make_pair(down, up);
 }
 
+NSEvent* KeyEventWithCharacter(unichar c) {
+  NSString* chars = [NSString stringWithCharacters:&c length:1];
+  return [NSEvent keyEventWithType:NSKeyDown
+                          location:NSZeroPoint
+                     modifierFlags:0
+                         timestamp:0.0
+                      windowNumber:0
+                           context:nil
+                        characters:chars
+       charactersIgnoringModifiers:chars
+                         isARepeat:NO
+                           keyCode:0];
+}
+
 }  // namespace cocoa_test_event_utils