findImage(const SkGlyph&) -> prepareImage(SkGlyph*)

Because it mutates the glyph.

Change-Id: Ic7ce320350764454d7a76335828d398f19b149d6
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/223797
Commit-Queue: Herb Derby <herb@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
diff --git a/bench/SkGlyphCacheBench.cpp b/bench/SkGlyphCacheBench.cpp
index d26e946..0edc512 100644
--- a/bench/SkGlyphCacheBench.cpp
+++ b/bench/SkGlyphCacheBench.cpp
@@ -31,8 +31,7 @@
         }
         for (int lookups = 0; lookups < 10; lookups++) {
             for (int c = ' '; c < 'z'; c++) {
-                SkGlyph* g = cache->glyph(glyphs[c]);
-                cache->findImage(*g);
+                cache->prepareImage(cache->glyph(glyphs[c]));
             }
         }
     }