SkQP: Fix report

Change-Id: I210f71444d4a567dc888c6b9dc136b70642a7a92
Reviewed-on: https://skia-review.googlesource.com/c/196508
Reviewed-by: Hal Canary <halcanary@google.com>
diff --git a/tools/skqp/src/skqp.cpp b/tools/skqp/src/skqp.cpp
index b259a54..83ffb47 100644
--- a/tools/skqp/src/skqp.cpp
+++ b/tools/skqp/src/skqp.cpp
@@ -456,7 +456,7 @@
         }
         const char* backendName = SkQP::GetBackendName(run.fBackend);
         std::string gmName = SkQP::GetGMName(run.fGM);
-        SkQP::RenderOutcome outcome;
+        const SkQP::RenderOutcome& outcome = run.fOutcome;
         auto str = SkStringPrintf("\"%s\",\"%s\",%d,%d,%" PRId64, backendName, gmName.c_str(),
                                   outcome.fMaxError, outcome.fBadPixelCount, outcome.fTotalError);
         write(&csvOut, SkStringPrintf("%s\n", str.c_str()));