[Mac] Re-enable pinned tabs; add support for mini-tabs and phantom tabs.

chrome/browser/defaults.h

Index: chrome/browser/defaults.h
diff --git a/chrome/browser/defaults.h b/chrome/browser/defaults.h
index 67497c8af053b7c9ddbf65d69685267ab9af8e8f..11dee1fc0f1b969889876800c3341b531e4086dc 100644
--- a/chrome/browser/defaults.h
+++ b/chrome/browser/defaults.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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.
 
@@ -64,9 +64,6 @@ extern const bool kSizeTabButtonToTopOfTabStrip;
 // asking the user for credentials.
 extern const bool kBootstrapSyncAuthentication;
 
-// Are pinned tabs enabled?
-extern const bool kEnablePinnedTabs;
-
 // Should other browsers be shown in about:memory page?
 extern const bool kShowOtherBrowsersInAboutMemory;