Remove PlatformThemeChromiumDefault as it is dead code

Source/core/platform/chromium/PlatformThemeChromiumDefault.h

Index: Source/core/platform/chromium/PlatformThemeChromiumDefault.h
diff --git a/Source/core/platform/chromium/PlatformThemeChromiumDefault.h b/Source/core/platform/chromium/PlatformThemeChromiumDefault.h
deleted file mode 100644
index a19402f8b32ac7c041483581a5423af41db411fe..0000000000000000000000000000000000000000
--- a/Source/core/platform/chromium/PlatformThemeChromiumDefault.h
+++ /dev/null
@@ -1,71 +0,0 @@
-/*
- * Copyright (C) 2011 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef PlatformThemeChromiumDefault_h
-#define PlatformThemeChromiumDefault_h
-
-#include "SkColor.h"
-#include "SkScalar.h"
-#include "core/platform/ThemeTypes.h"
-#include "core/platform/graphics/GraphicsContext.h"
-
-namespace WebCore {
-
-class PlatformThemeChromiumDefault {
-public:
-    enum ArrowDirection {
-        North,
-        East,
-        South,
-        West,
-    };
-
-    static void setScrollbarColors(unsigned inactiveColor,
-                                   unsigned activeColor,
-                                   unsigned trackColor);
-    static unsigned thumbInactiveColor() { return s_thumbInactiveColor; }
-    static unsigned thumbActiveColor() { return s_thumbActiveColor; }
-    static unsigned trackColor() { return s_trackColor; }
-
-    static SkColor saturateAndBrighten(const SkScalar hsv[3], SkScalar saturateAmount, SkScalar brightenAmount);
-    static SkColor outlineColor(const SkScalar hsv1[3], const SkScalar hsv2[3]);
-    static void paintArrowButton(GraphicsContext*, const IntRect&, ArrowDirection, ControlStates);
-
-private:
-    PlatformThemeChromiumDefault() { }
-
-    static unsigned s_thumbInactiveColor;
-    static unsigned s_thumbActiveColor;
-    static unsigned s_trackColor;
-};
-
-} // namespace WebCore
-
-#endif // PlatformThemeChromiumDefault_h