Add instantiation declarations for PointBase, SizeBase, RectBase

ui/gfx/rect_f.h

 // Copyright (c) 2012 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 UI_GFX_RECT_F_H_
 #define UI_GFX_RECT_F_H_
 #pragma once
 
 #include <string>
 
@@ skipping 15 matching lines @@
   explicit RectF(const gfx::SizeF& size);
   RectF(const gfx::PointF& origin, const gfx::SizeF& size);
 
   ~RectF();
 
   Rect ToRect() const;
 
   std::string ToString() const;
 };
 
+#if !defined(COMPILER_MSVC)
+extern template class RectBase<RectF, PointF, SizeF, InsetsF, float>;
+#endif
+
 }  // namespace gfx
 
 #endif  // UI_GFX_RECT_H_