views::Border: Added CreateRoundedRectBorder.

ui/gfx/canvas.h

Index: ui/gfx/canvas.h
diff --git a/ui/gfx/canvas.h b/ui/gfx/canvas.h
index 0c409447a8ac7e43e58842178ba425e20a9d14bd..cdaee8e1bd0285a3019cbc480b314c07b94165cf 100644
--- a/ui/gfx/canvas.h
+++ b/ui/gfx/canvas.h
@@ -20,6 +20,7 @@
 namespace gfx {
 
 class Rect;
+class RectF;
 class FontList;
 class Point;
 class Size;
@@ -248,9 +249,15 @@ class GFX_EXPORT Canvas {
                   const SkPaint& paint);
 
   // Draws the given rectangle with rounded corners of |radius| using the
-  // given |paint| parameters.
+  // given |paint| parameters. NOTE: The RectF version is preferred because the
+  // rectangle should be painted at a half-pixel offset when painting with
+  // odd-numbered thickness.

[Evan Stade, 2015/11/10 00:34:32]

I don't even think you need to write this much. I'd put:

// DEPRECATED in favor of the RectF version below. TODO(mgiuca): remove this.

(don't worry, I don't think TODO(mgiuca) means you're signing up to fix all of
Chrome.) Also if you file a bug about this it's fairly likely an external
contributor will pick it up.

[Matt Giuca, 2015/11/10 00:53:15]

Done.

   void DrawRoundRect(const Rect& rect, int radius, const SkPaint& paint);
 
+  // Draws the given rectangle with rounded corners of |radius| using the
+  // given |paint| parameters.
+  void DrawRoundRect(const RectF& rect, float radius, const SkPaint& paint);
+
   // Draws the given path using the given |paint| parameters.
   void DrawPath(const SkPath& path, const SkPaint& paint);