Optimizing: Move GraphChecker memory allocations to arena.

Bug: 18120045
Change-Id: I3934158e6ea4868d9baa1dfcc53b603ca6c521e2
diff --git a/compiler/optimizing/graph_checker_test.cc b/compiler/optimizing/graph_checker_test.cc
index 0f66775..fee56c7 100644
--- a/compiler/optimizing/graph_checker_test.cc
+++ b/compiler/optimizing/graph_checker_test.cc
@@ -50,7 +50,7 @@
   HGraph* graph = CreateCFG(&allocator, data);
   ASSERT_NE(graph, nullptr);
 
-  GraphChecker graph_checker(&allocator, graph);
+  GraphChecker graph_checker(graph);
   graph_checker.Run();
   ASSERT_TRUE(graph_checker.IsValid());
 }
@@ -64,7 +64,7 @@
   graph->BuildDominatorTree();
   graph->TransformToSsa();
 
-  SSAChecker ssa_checker(&allocator, graph);
+  SSAChecker ssa_checker(graph);
   ssa_checker.Run();
   ASSERT_TRUE(ssa_checker.IsValid());
 }
@@ -112,7 +112,7 @@
   ArenaAllocator allocator(&pool);
 
   HGraph* graph = CreateSimpleCFG(&allocator);
-  GraphChecker graph_checker(&allocator, graph);
+  GraphChecker graph_checker(graph);
   graph_checker.Run();
   ASSERT_TRUE(graph_checker.IsValid());
 
@@ -130,7 +130,7 @@
   ArenaAllocator allocator(&pool);
 
   HGraph* graph = CreateSimpleCFG(&allocator);
-  GraphChecker graph_checker(&allocator, graph);
+  GraphChecker graph_checker(graph);
   graph_checker.Run();
   ASSERT_TRUE(graph_checker.IsValid());