Move geometric types to a separate, more lightweight target.

ui/gfx/geometry/size_f.h

Index: ui/gfx/geometry/size_f.h
diff --git a/ui/gfx/size_f.h b/ui/gfx/geometry/size_f.h
similarity index 89%
copy from ui/gfx/size_f.h
copy to ui/gfx/geometry/size_f.h
index b9065273c8ed041e0fcb48c86cc5c7a05c4f5b41..8ec5628e62d1203f2ee93d4557b7c043c29138e1 100644
--- a/ui/gfx/size_f.h
+++ b/ui/gfx/geometry/size_f.h
@@ -2,14 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef UI_GFX_SIZE_F_H_
-#define UI_GFX_SIZE_F_H_
+#ifndef UI_GFX_GEOMETRY_SIZE_F_H_
+#define UI_GFX_GEOMETRY_SIZE_F_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
+#include "ui/gfx/geometry/size_base.h"
 #include "ui/gfx/gfx_export.h"
-#include "ui/gfx/size_base.h"
 
 namespace gfx {
 
@@ -51,4 +51,4 @@ extern template class SizeBase<SizeF, float>;
 
 }  // namespace gfx
 
-#endif  // UI_GFX_SIZE_F_H_
+#endif  // UI_GFX_GEOMETRY_SIZE_F_H_