Pass const gfx::Rect& as the first parameter to FillRect.

ui/gfx/canvas.h

Index: ui/gfx/canvas.h
diff --git a/ui/gfx/canvas.h b/ui/gfx/canvas.h
index c3aa3b01fb000067cc455a2f7a68a402714bf5af..d774309fd5782dd1a55ffbf12147c156e546a376 100644
--- a/ui/gfx/canvas.h
+++ b/ui/gfx/canvas.h
@@ -105,17 +105,17 @@ class UI_EXPORT Canvas {
 
   virtual void Scale(int x_scale, int y_scale) = 0;
 
-  // Fills the specified region with the specified color using a transfer
-  // mode of SkXfermode::kSrcOver_Mode.
-  virtual void FillRect(const SkColor& color, const gfx::Rect& rect) = 0;
+  // Fills |rect| with |color| using a transfer mode of
+  // SkXfermode::kSrcOver_Mode.
+  virtual void FillRect(const gfx::Rect& rect, const SkColor& color) = 0;
 
-  // Fills the specified region with the specified color and mode.
-  virtual void FillRect(const SkColor& color,
-                        const gfx::Rect& rect,
+  // Fills |rect| with the specified |color| and |mode|.
+  virtual void FillRect(const gfx::Rect& rect,
+                        const SkColor& color,
                         SkXfermode::Mode mode) = 0;
 
-  // Fills the specified region with the specified brush.
-  virtual void FillRect(const gfx::Brush* brush, const gfx::Rect& rect) = 0;
+  // Fills |rect| with the specified |brush|.
+  virtual void FillRect(const gfx::Rect& rect, const gfx::Brush* brush) = 0;
 
   // Draws a single pixel rect in the specified region with the specified
   // color, using a transfer mode of SkXfermode::kSrcOver_Mode.