Add a parent environment to HEnvironment.

This code has no functionality change. It adds a placeholder
for chaining inlined frames.

Change-Id: I5ec57335af76ee406052345b947aad98a6a4423a
diff --git a/compiler/optimizing/inliner.cc b/compiler/optimizing/inliner.cc
index ada32db..afffc7a 100644
--- a/compiler/optimizing/inliner.cc
+++ b/compiler/optimizing/inliner.cc
@@ -170,7 +170,11 @@
     nullptr);
 
   HGraph* callee_graph = new (graph_->GetArena()) HGraph(
-      graph_->GetArena(), graph_->IsDebuggable(), graph_->GetCurrentInstructionId());
+      graph_->GetArena(),
+      caller_dex_file,
+      method_index,
+      graph_->IsDebuggable(),
+      graph_->GetCurrentInstructionId());
 
   OptimizingCompilerStats inline_stats;
   HGraphBuilder builder(callee_graph,