cleanup: Cleanup the TileImageInt APIs

ui/gfx/canvas.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_CANVAS_H_
 #define UI_GFX_CANVAS_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 407 matching lines @@
                     int y,
                     int w,
                     int h);
   void TileImageInt(const ImageSkia& image,
                     int src_x,
                     int src_y,
                     int dest_x,
                     int dest_y,
                     int w,
                     int h,
-                    cc::PaintFlags* flags = nullptr);
-  void TileImageInt(const ImageSkia& image,
-                    int src_x,
-                    int src_y,
-                    float tile_scale_x,
-                    float tile_scale_y,
-                    int dest_x,
-                    int dest_y,
-                    int w,
-                    int h,
+                    float tile_scale = 1.0f,
                     cc::PaintFlags* flags = nullptr);
 
   // Helper for TileImageInt().  Initializes |flags| for tiling |image| with the
   // given parameters.  Returns false if the provided image does not have a
   // representation for the current scale.
   bool InitPaintFlagsForTiling(const ImageSkia& image,
                                int src_x,
                                int src_y,
                                float tile_scale_x,
                                float tile_scale_y,
@@ skipping 51 matching lines @@
   base::Optional<SkBitmap> bitmap_;
   base::Optional<cc::SkiaPaintCanvas> owned_canvas_;
   cc::PaintCanvas* canvas_;
 
   DISALLOW_COPY_AND_ASSIGN(Canvas);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_CANVAS_H_