Make unit test tell if a method is a leaf.

The runtime is not initialized completely in gtests, so we
cannot run code (such as explicit stack overflow checks) that
look at tls values.

Change-Id: I74a4449b01eb203f1b411dda700e9459878d0d55
diff --git a/compiler/optimizing/code_generator.h b/compiler/optimizing/code_generator.h
index 936ca28..b31c3a3 100644
--- a/compiler/optimizing/code_generator.h
+++ b/compiler/optimizing/code_generator.h
@@ -70,7 +70,7 @@
  public:
   // Compiles the graph to executable instructions. Returns whether the compilation
   // succeeded.
-  void CompileBaseline(CodeAllocator* allocator);
+  void CompileBaseline(CodeAllocator* allocator, bool is_leaf = false);
   void CompileOptimized(CodeAllocator* allocator);
   static CodeGenerator* Create(ArenaAllocator* allocator,
                                HGraph* graph,