Move IsVeryLarge check before we create verification results

Otherwise we can end up creating verification results when they are
not actually needed (if the compiler filter was >= quicken).

Bug: 63467744
Test: test-art-host
Change-Id: Ied2a12e0e4c2010f3f660e278c3a5111545ba251
diff --git a/compiler/dex/quick_compiler_callbacks.h b/compiler/dex/quick_compiler_callbacks.h
index 2100522..a3a6c09 100644
--- a/compiler/dex/quick_compiler_callbacks.h
+++ b/compiler/dex/quick_compiler_callbacks.h
@@ -26,11 +26,8 @@
 
 class QuickCompilerCallbacks FINAL : public CompilerCallbacks {
   public:
-    QuickCompilerCallbacks(VerificationResults* verification_results,
-                           CompilerCallbacks::CallbackMode mode)
-        : CompilerCallbacks(mode),
-          verification_results_(verification_results),
-          verifier_deps_(nullptr) {}
+    explicit QuickCompilerCallbacks(CompilerCallbacks::CallbackMode mode)
+        : CompilerCallbacks(mode) {}
 
     ~QuickCompilerCallbacks() { }
 
@@ -52,8 +49,12 @@
       verifier_deps_.reset(deps);
     }
 
+    void SetVerificationResults(VerificationResults* verification_results) {
+      verification_results_ = verification_results;
+    }
+
   private:
-    VerificationResults* const verification_results_;
+    VerificationResults* verification_results_ = nullptr;
     std::unique_ptr<verifier::VerifierDeps> verifier_deps_;
 };