Fix a NOTREACHED when printing the layer hierarchy of a recorded window

Fixed: 1168347
TEST: Manual
Change-Id: I65aa794b8f4f0692ed881a4ba3abfe49437a528d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2638496Reviewed-by: kylechar <kylechar@chromium.org>
Commit-Queue: Ahmed Fakhry <afakhry@chromium.org>
Cr-Commit-Position: refs/heads/master@{#845250}

cc/trees/effect_node.cc

@@ -142,6 +142,10 @@ const char* RenderSurfaceReasonToString(RenderSurfaceReason reason) {
       return "cache";
     case RenderSurfaceReason::kCopyRequest:
       return "copy request";
+    case RenderSurfaceReason::kMirrored:
+      return "mirrored";
+    case RenderSurfaceReason::kSubtreeIsBeingCaptured:
+      return "subtree being captured";
     case RenderSurfaceReason::kTest:
       return "test";
     default: