ui: Add methods to clamp Sizes, Points, and Vectors from above or below.

ui/gfx/point_base.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_POINT_BASE_H_
 #define UI_GFX_POINT_BASE_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 23 matching lines @@
   }
 
   void operator+=(const VectorClass& vector) {
     Offset(vector.x(), vector.y());
   }
 
   void operator-=(const VectorClass& vector) {
     Offset(-vector.x(), -vector.y());
   }
 
+  void ClampToMax(const Class& max) {
+    x_ = x_ <= max.x_ ? x_ : max.x_;
+    y_ = y_ <= max.y_ ? y_ : max.y_;
+  }
+
+  void ClampToMin(const Class& min) {
+    x_ = x_ >= min.x_ ? x_ : min.x_;
+    y_ = y_ >= min.y_ ? y_ : min.y_;
+  }
+
   bool IsOrigin() const {
     return x_ == 0 && y_ == 0;
   }
 
   VectorClass OffsetFromOrigin() const {
     return VectorClass(x_, y_);
   }
 
   VectorClass OffsetFrom(const Class& other) const {
     return VectorClass(x_ - other.x_, y_ - other.y_);
@@ skipping 16 matching lines @@
   ~PointBase() {}
 
  private:
   Type x_;
   Type y_;
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_POINT_BASE_H_