Replace NULL with nullptr

Also fixed some lines that were too long, and a few other minor
details.

Change-Id: I6efba5fb6e03eb5d0a300fddb2a75bf8e2f175cb
diff --git a/compiler/dex/verification_results.cc b/compiler/dex/verification_results.cc
index a4df00e..c1d5cb7 100644
--- a/compiler/dex/verification_results.cc
+++ b/compiler/dex/verification_results.cc
@@ -46,7 +46,7 @@
 }
 
 bool VerificationResults::ProcessVerifiedMethod(verifier::MethodVerifier* method_verifier) {
-  DCHECK(method_verifier != NULL);
+  DCHECK(method_verifier != nullptr);
   MethodReference ref = method_verifier->GetMethodReference();
   bool compile = IsCandidateForCompilation(ref, method_verifier->GetAccessFlags());
   const VerifiedMethod* verified_method = VerifiedMethod::Create(method_verifier, compile);