Add generic PaletteDelegate code.

chrome/browser/ui/ash/palette_delegate_chromeos.cc

Index: chrome/browser/ui/ash/palette_delegate_chromeos.cc
diff --git a/chrome/browser/ui/ash/palette_delegate_chromeos.cc b/chrome/browser/ui/ash/palette_delegate_chromeos.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0342a30c08b6f48a81a9f6cb3efed1d5a9b91b31
--- /dev/null
+++ b/chrome/browser/ui/ash/palette_delegate_chromeos.cc
@@ -0,0 +1,13 @@
+// Copyright 2016 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/browser/ui/ash/palette_delegate_chromeos.h"
+
+namespace chromeos {
+
+PaletteDelegateChromeOS::PaletteDelegateChromeOS() {}
+
+PaletteDelegateChromeOS::~PaletteDelegateChromeOS() {}
+
+}  // namespace chromeos