Remove uses of skia::GetWritablePixels(PaintCanvas)

cc/paint/paint_canvas.cc

Index: cc/paint/paint_canvas.cc
diff --git a/cc/paint/paint_canvas.cc b/cc/paint/paint_canvas.cc
index c3512dada61547f9b7d69768df6d6fa316f13acf..41ae9c0ed63a9462e62b0a1803b12485cd774c9b 100644
--- a/cc/paint/paint_canvas.cc
+++ b/cc/paint/paint_canvas.cc
@@ -21,4 +21,21 @@ PaintCanvasPassThrough::PaintCanvasPassThrough(int width, int height)
 
 PaintCanvasPassThrough::~PaintCanvasPassThrough() = default;
 
+bool ToPixmap(PaintCanvas* canvas, SkPixmap* output) {
+  if (!canvas || !output) {

[danakj, 2017/02/09 23:13:50]

ಠ_ಠ

is needed?

[danakj, 2017/02/09 23:23:58]

I can't see why this would be needed, so LGTM with this gone

+    return false;
+  }
+
+  SkImageInfo info;
+  size_t row_bytes;
+  void* pixels = canvas->accessTopLayerPixels(&info, &row_bytes);
+  if (!pixels) {
+    output->reset();
+    return false;
+  }
+
+  output->reset(info, pixels, row_bytes);
+  return true;
+}
+
 }  // namespace cc