Move geometric types to a separate, more lightweight target.

ui/gfx/geometry/matrix3_f.h

Index: ui/gfx/geometry/matrix3_f.h
diff --git a/ui/gfx/matrix3_f.h b/ui/gfx/geometry/matrix3_f.h
similarity index 95%
copy from ui/gfx/matrix3_f.h
copy to ui/gfx/geometry/matrix3_f.h
index a8ae5b578a8dfedbf9f5ac79deca1cbcb169932d..7e43496fd715e1ffaa9080b45994834ac5c5f3c0 100644
--- a/ui/gfx/matrix3_f.h
+++ b/ui/gfx/geometry/matrix3_f.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_MATRIX3_F_H_
-#define UI_GFX_MATRIX3_F_H_
+#ifndef UI_GFX_GEOMETRY_MATRIX3_F_H_
+#define UI_GFX_GEOMETRY_MATRIX3_F_H_
 
 #include "base/logging.h"
-#include "ui/gfx/vector3d_f.h"
+#include "ui/gfx/geometry/vector3d_f.h"
 
 namespace gfx {
 
@@ -105,4 +105,4 @@ inline bool operator==(const Matrix3F& lhs, const Matrix3F& rhs) {
 
 }  // namespace gfx
 
-#endif  // UI_GFX_MATRIX3_F_H_
+#endif  // UI_GFX_GEOMETRY_MATRIX3_F_H_