This changelist represents the necessary merger of two others:...

chrome/browser/cocoa/event_utils.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.
+
+#import "chrome/browser/cocoa/event_utils.h"
+
+namespace event_utils {
+
+WindowOpenDisposition WindowOpenDispositionFromNSEvent(NSEvent* event) {
+  NSUInteger modifiers = [event modifierFlags];
+  if ([event buttonNumber] == 2 || modifiers & NSCommandKeyMask)
+    return modifiers & NSShiftKeyMask ? NEW_FOREGROUND_TAB : NEW_BACKGROUND_TAB;
+  return modifiers & NSShiftKeyMask ? NEW_WINDOW : CURRENT_TAB;
+}
+
+}  // namespace event_utils