Implement input type=color UI (mac part)

chrome/browser/ui/cocoa/color_utils.h

Index: chrome/browser/ui/cocoa/color_utils.h
diff --git a/chrome/browser/ui/cocoa/color_utils.h b/chrome/browser/ui/cocoa/color_utils.h
new file mode 100644
index 0000000000000000000000000000000000000000..6e2dde989a8a43b4790bed823e899e7ffb3d6226
--- /dev/null
+++ b/chrome/browser/ui/cocoa/color_utils.h
@@ -0,0 +1,16 @@
+// 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.
+
+#ifndef CHROME_BROWSER_UI_COCOA_COLOR_UTILS_H_
+#define CHROME_BROWSER_UI_COCOA_COLOR_UTILS_H_
+#pragma once
+
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebColor.h"
+
+#import <Cocoa/Cocoa.h>
+
+WebKit::WebColor WebColorFromNSColor(NSColor *color);
+NSColor *NSColorFromWebColor(WebKit::WebColor color);
+
+#endif  // CHROME_BROWSER_UI_COCOA_COLOR_UTILS_H_