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

ui/gfx/size_base.h

Index: ui/gfx/size_base.h
diff --git a/ui/gfx/size_base.h b/ui/gfx/size_base.h
index cd7221c345ec701349fbfec0bd317fdc8020fa64..63820b220ef53db12ffe883af492378088c8baab 100644
--- a/ui/gfx/size_base.h
+++ b/ui/gfx/size_base.h
@@ -35,6 +35,16 @@ class UI_EXPORT SizeBase {
   void set_width(Type width) { width_ = width; }
   void set_height(Type height) { height_ = height; }
 
+  void ClampFromAbove(const Class& other) {

[sky, 2012/11/09 18:23:12]

The name here is even more confusing. Sizes generally don't have an implied
direction. Is there a better name you could use?

[danakj, 2012/11/09 18:24:25]

Oh, hm. I hadn't thought of it in terms of direction. I was thinking above like,
on the number line. I'll think of something.

+    width_ = width_ <= other.width_ ? width_ : other.width_;
+    height_ = height_ <= other.height_ ? height_ : other.height_;
+  }
+
+  void ClampFromBelow(const Class& other) {
+    width_ = width_ >= other.width_ ? width_ : other.width_;
+    height_ = height_ >= other.height_ ? height_ : other.height_;
+  }
+
   bool IsEmpty() const {
     return (width_ <= 0) || (height_ <= 0);
   }