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 5928cecc78f5286773b8f5eb6770bf12cb2bd7f6..adb4f602c7ecb941e2f156e7f55654d5598fc221 100644
--- a/cc/paint/skia_paint_canvas.cc
+++ b/cc/paint/skia_paint_canvas.cc
@@ -22,6 +22,7 @@ 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() {
@@ -40,10 +41,6 @@ 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,