Fix mislabeled argument comments.

Once the existing cases are fixed, we can enable bugprone-argument-
comment to allow clang-tidy to verify these for us automatically going
forward. (http://review.skia.org/306848)

Change-Id: I5c21b28bcbdebb6b74c2924cc5f19c48446ecb42
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/306847
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: John Stiles <johnstiles@google.com>
diff --git a/tools/fm/fm.cpp b/tools/fm/fm.cpp
index c0aefd0..cb06328 100644
--- a/tools/fm/fm.cpp
+++ b/tools/fm/fm.cpp
@@ -206,8 +206,8 @@
         for (int x : order) {
             SkRect dst = {x*dim, y*dim, (x+1)*dim, (y+1)*dim};
 
-            SkAutoCanvasRestore _(canvas, true/*save now*/);
-            canvas->clipRect(dst, /*aa=*/true);
+            SkAutoCanvasRestore _(canvas, /*doSave=*/true);
+            canvas->clipRect(dst, /*doAntiAlias=*/true);
             canvas->concat(SkMatrix::MakeRectToRect(SkRect::MakeSize(animation->size()),
                                                     dst,
                                                     SkMatrix::kCenter_ScaleToFit));