Move geometric types to a separate, more lightweight target.

ui/gfx/geometry/rect_conversions.h

Index: ui/gfx/geometry/rect_conversions.h
diff --git a/ui/gfx/rect_conversions.h b/ui/gfx/geometry/rect_conversions.h
similarity index 85%
copy from ui/gfx/rect_conversions.h
copy to ui/gfx/geometry/rect_conversions.h
index 988f6c76418869653081b9add77044157ed26e5e..617074abeeed4047377f7a19986613618077ba8b 100644
--- a/ui/gfx/rect_conversions.h
+++ b/ui/gfx/geometry/rect_conversions.h
@@ -2,11 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef UI_GFX_RECT_CONVERSIONS_H_
-#define UI_GFX_RECT_CONVERSIONS_H_
+#ifndef UI_GFX_GEOMETRY_RECT_CONVERSIONS_H_
+#define UI_GFX_GEOMETRY_RECT_CONVERSIONS_H_
 
-#include "ui/gfx/rect.h"
-#include "ui/gfx/rect_f.h"
+#include "ui/gfx/geometry/rect.h"
+#include "ui/gfx/geometry/rect_f.h"
 
 namespace gfx {
 
@@ -33,4 +33,4 @@ GFX_EXPORT Rect ToFlooredRectDeprecated(const RectF& rect);
 
 }  // namespace gfx
 
-#endif  // UI_GFX_RECT_CONVERSIONS_H_
+#endif  // UI_GFX_GEOMETRY_RECT_CONVERSIONS_H_