Optimizing: Move GraphChecker memory allocations to arena.

Bug: 18120045
Change-Id: I3934158e6ea4868d9baa1dfcc53b603ca6c521e2
diff --git a/compiler/optimizing/dead_code_elimination_test.cc b/compiler/optimizing/dead_code_elimination_test.cc
index ee3a61a..cf0a4ac 100644
--- a/compiler/optimizing/dead_code_elimination_test.cc
+++ b/compiler/optimizing/dead_code_elimination_test.cc
@@ -45,7 +45,7 @@
       X86InstructionSetFeatures::FromCppDefines());
   x86::CodeGeneratorX86 codegenX86(graph, *features_x86.get(), CompilerOptions());
   HDeadCodeElimination(graph).Run();
-  SSAChecker ssa_checker(&allocator, graph);
+  SSAChecker ssa_checker(graph);
   ssa_checker.Run();
   ASSERT_TRUE(ssa_checker.IsValid());