Sky: different tack for custom Rect type in the Canvas API.

sky/engine/core/painting/Canvas.h

Index: sky/engine/core/painting/Canvas.h
diff --git a/sky/engine/core/painting/Canvas.h b/sky/engine/core/painting/Canvas.h
index ca8af6e29ec4e494316248455a84bf2f01ad81d6..e26a0ff4d84a0e805be9fcefe3bb579554bc1db8 100644
--- a/sky/engine/core/painting/Canvas.h
+++ b/sky/engine/core/painting/Canvas.h
@@ -7,6 +7,7 @@
 
 #include "sky/engine/core/painting/Paint.h"
 #include "sky/engine/core/painting/Picture.h"
+#include "sky/engine/core/painting/Rect.h"
 #include "sky/engine/platform/graphics/DisplayList.h"
 #include "sky/engine/tonic/dart_wrappable.h"
 #include "sky/engine/wtf/PassRefPtr.h"
@@ -27,7 +28,7 @@ public:
     float height() const { return m_size.height(); }
 
     void save();
-    void saveLayer(const Vector<float>& bounds, const Paint* paint);
+    void saveLayer(const Rect& bounds, const Paint* paint);
     void restore();
 
     void translate(float dx, float dy);
@@ -36,12 +37,12 @@ public:
     void skew(float sx, float sy);
     void concat(const Vector<float>& matrix);
 
-    void clipRect(const Vector<float>& rect);
+    void clipRect(const Rect& rect);
 
     void drawPicture(Picture* picture);
     void drawPaint(const Paint* paint);
-    void drawRect(const Vector<float>& rect, const Paint* paint);
-    void drawOval(const Vector<float>& rect, const Paint* paint);
+    void drawRect(const Rect& rect, const Paint* paint);
+    void drawOval(const Rect& rect, const Paint* paint);
     void drawCircle(float x, float y, float radius, const Paint* paint);
 
     SkCanvas* skCanvas() { return m_canvas; }