Change call-sites now that SkCanvas is not ref-counted

components/test_runner/pixel_dump.cc

Index: components/test_runner/pixel_dump.cc
diff --git a/components/test_runner/pixel_dump.cc b/components/test_runner/pixel_dump.cc
index de2316a71aa982164597c787bd2b515cba6568b2..67881c94b30008ab4e48d40cc36e9bd873e868de 100644
--- a/components/test_runner/pixel_dump.cc
+++ b/components/test_runner/pixel_dump.cc
@@ -96,8 +96,8 @@ void CapturePixelsForPrinting(std::unique_ptr<PixelsDumpRequest> dump_request) {
   int totalHeight = page_count * (page_size_in_pixels.height + 1) - 1;
 
   bool is_opaque = false;
-  sk_sp<SkCanvas> canvas(skia::TryCreateBitmapCanvas(
-      page_size_in_pixels.width, totalHeight, is_opaque));
+  std::unique_ptr<SkCanvas> canvas = skia::TryCreateBitmapCanvas(
+      page_size_in_pixels.width, totalHeight, is_opaque);
   if (!canvas) {
     LOG(ERROR) << "Failed to create canvas width="
                << page_size_in_pixels.width << " height=" << totalHeight;