Use definitionForWithoutExistenceAssert() in ReflectionOptimizer

Change-Id: I43dc7ed9a77623b4fcd2c7591316857a263aa404
diff --git a/src/main/java/com/android/tools/r8/ir/optimize/ReflectionOptimizer.java b/src/main/java/com/android/tools/r8/ir/optimize/ReflectionOptimizer.java
index eef169e..64a8c86 100644
--- a/src/main/java/com/android/tools/r8/ir/optimize/ReflectionOptimizer.java
+++ b/src/main/java/com/android/tools/r8/ir/optimize/ReflectionOptimizer.java
@@ -189,7 +189,7 @@
     }
     // Make sure the (base) type is resolvable.
     DexType baseType = type.toBaseType(dexItemFactory);
-    DexClass baseClazz = appView.definitionFor(baseType);
+    DexClass baseClazz = appView.appInfo().definitionForWithoutExistenceAssert(baseType);
     if (baseClazz == null || !baseClazz.isResolvable(appView)) {
       return null;
     }