Revert "Another missed flush call fix."

This reverts commit 2d3d45a625336979b5659e4078286248f24b95d6.

Reason for revert: reverting base CL for chrome roll

Original change's description:
> Another missed flush call fix.
> 
> TBR:bsalomon@google.com
> Change-Id: Ia9891916d41c2550b82e2e7222ec24bde7a939b6
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/290896
> Reviewed-by: Greg Daniel <egdaniel@google.com>
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Greg Daniel <egdaniel@google.com>

TBR=egdaniel@google.com,bsalomon@google.com

Change-Id: Iac0c9b82f0a7e7748db3ef6d8724786e15b94db5
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/290832
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
diff --git a/tools/skottie_ios_app/SkiaMetalContext.mm b/tools/skottie_ios_app/SkiaMetalContext.mm
index f67d547..b49e360 100644
--- a/tools/skottie_ios_app/SkiaMetalContext.mm
+++ b/tools/skottie_ios_app/SkiaMetalContext.mm
@@ -55,7 +55,7 @@
         return;
     }
     [viewController draw:rect toCanvas:surface->getCanvas() atSize:size];
-    surface->flushAndSubmit();
+    surface->flush();
     surface = nullptr;
 
     id<MTLCommandBuffer> commandBuffer = [fQueue commandBuffer];