Remove PaintCanvas::writePixels

cc/paint/skia_paint_canvas.h

Index: cc/paint/skia_paint_canvas.h
diff --git a/cc/paint/skia_paint_canvas.h b/cc/paint/skia_paint_canvas.h
index f50e2321b2589f397f8d7c711c0bdf442c827cce..8b29bd613535ddaf8d392d62a655014fd4108f60 100644
--- a/cc/paint/skia_paint_canvas.h
+++ b/cc/paint/skia_paint_canvas.h
@@ -38,11 +38,6 @@ class CC_PAINT_EXPORT SkiaPaintCanvas final : public PaintCanvas {
 
   void flush() override;
 
-  bool writePixels(const SkImageInfo& info,
-                   const void* pixels,
-                   size_t row_bytes,
-                   int x,
-                   int y) override;
   int save() override;
   int saveLayer(const SkRect* bounds, const PaintFlags* flags) override;
   int saveLayerAlpha(const SkRect* bounds, U8CPU alpha) override;