Move geometric types to a separate, more lightweight target.

ui/gfx/geometry/vector3d_f.h

Index: ui/gfx/geometry/vector3d_f.h
diff --git a/ui/gfx/vector3d_f.h b/ui/gfx/geometry/vector3d_f.h
similarity index 95%
copy from ui/gfx/vector3d_f.h
copy to ui/gfx/geometry/vector3d_f.h
index 0e91a362ecabe5108cf35f4f0b59f8458e4e815e..8f8b75d91e7c858377ec21121efbc6729020bc54 100644
--- a/ui/gfx/vector3d_f.h
+++ b/ui/gfx/geometry/vector3d_f.h
@@ -7,13 +7,13 @@
 // produce a vector, and adding a vector to a point produces the point at the
 // vector's distance from the original point.
 
-#ifndef UI_GFX_VECTOR3D_F_H_
-#define UI_GFX_VECTOR3D_F_H_
+#ifndef UI_GFX_GEOMETRY_VECTOR3D_F_H_
+#define UI_GFX_GEOMETRY_VECTOR3D_F_H_
 
 #include <string>
 
+#include "ui/gfx/geometry/vector2d_f.h"
 #include "ui/gfx/gfx_export.h"
-#include "ui/gfx/vector2d_f.h"
 
 namespace gfx {
 
@@ -121,4 +121,4 @@ inline Vector3dF ScaleVector3d(const Vector3dF& v, float scale) {
 
 }  // namespace gfx
 
-#endif // UI_GFX_VECTOR3D_F_H_
+#endif // UI_GFX_GEOMETRY_VECTOR3D_F_H_