Small fix to https://codereview.chromium.org/1873733003 (More cleanup in the Vulkan viewer) GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1875793002 Review URL: https://codereview.chromium.org/1875793002
* add animation support for GMs * don't load all SkPictures at start, only as needed * don't update constantly, only for animation or stats * hide/show stats * scale slides up/down BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1873733003 Review URL: https://codereview.chromium.org/1873733003
BUG=520476 Review URL: https://codereview.chromium.org/1302503003