Revert vector icon CLs.

ui/gfx/vector_icons/vector_icons.cc.template

-// Copyright 2015 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.
-
-// vector_icons.cc.template is used to generate vector_icons.cc. Edit the former
-// rather than the latter.
-
-#include "ui/gfx/vector_icons.h"
-
-#include "base/logging.h"
-#include "ui/gfx/vector_icons_public.h"
-
-#define ICON_TEMPLATE(icon_name, ...) \
-    case VectorIconId::icon_name: {\
-      static PathElement path[] = {__VA_ARGS__};\
-      return path;\
-    }
-
-namespace gfx {
-
-const PathElement* GetPathForVectorIcon(VectorIconId id) {
-  switch (id) {
-    case VectorIconId::VECTOR_ICON_NONE:
-      NOTREACHED();
-      return nullptr;
-
-TEMPLATE_PLACEHOLDER
-  }
-
-  NOTREACHED();
-  return nullptr;
-}
-
-}  // namespace gfx