cc/paint: Remove PaintCanvas::peekPixels.

cc/paint/skia_paint_canvas.cc

Index: cc/paint/skia_paint_canvas.cc
diff --git a/cc/paint/skia_paint_canvas.cc b/cc/paint/skia_paint_canvas.cc
index 41ff7236754571b64d7fbcc244d24af3568cb82e..0421d89fc95d4fd8fc364117c621e4d69139cd90 100644
--- a/cc/paint/skia_paint_canvas.cc
+++ b/cc/paint/skia_paint_canvas.cc
@@ -23,6 +23,7 @@ SkiaPaintCanvas::SkiaPaintCanvas(const SkBitmap& bitmap,
                                  const SkSurfaceProps& props)
     : canvas_(new SkCanvas(bitmap, props)), owned_(canvas_) {}
 
+SkiaPaintCanvas::SkiaPaintCanvas(SkiaPaintCanvas&& other) = default;
 SkiaPaintCanvas::~SkiaPaintCanvas() = default;
 
 SkMetaData& SkiaPaintCanvas::getMetaData() {
@@ -41,10 +42,6 @@ SkISize SkiaPaintCanvas::getBaseLayerSize() const {
   return canvas_->getBaseLayerSize();
 }
 
-bool SkiaPaintCanvas::peekPixels(SkPixmap* pixmap) {
-  return canvas_->peekPixels(pixmap);
-}
-
 bool SkiaPaintCanvas::readPixels(const SkImageInfo& dest_info,
                                  void* dest_pixels,
                                  size_t dest_row_bytes,