Revert "Tweak inlining heuristics."

This reverts commit fcb7613d3aaa9a6802800b6e957aaad51cedf6dc.

Change-Id: Idc0df6a2f68e8b5aa740bb1259f19c2953811510
diff --git a/compiler/optimizing/inliner.h b/compiler/optimizing/inliner.h
index 8de510e..7b9fb73 100644
--- a/compiler/optimizing/inliner.h
+++ b/compiler/optimizing/inliner.h
@@ -40,15 +40,13 @@
            CompilerDriver* compiler_driver,
            StackHandleScopeCollection* handles,
            OptimizingCompilerStats* stats,
-           size_t total_number_of_dex_registers,
-           size_t depth)
+           size_t depth = 0)
       : HOptimization(outer_graph, kInlinerPassName, stats),
         outermost_graph_(outermost_graph),
         outer_compilation_unit_(outer_compilation_unit),
         caller_compilation_unit_(caller_compilation_unit),
         codegen_(codegen),
         compiler_driver_(compiler_driver),
-        total_number_of_dex_registers_(total_number_of_dex_registers),
         depth_(depth),
         number_of_inlined_instructions_(0),
         handles_(handles) {}
@@ -90,7 +88,6 @@
   const DexCompilationUnit& caller_compilation_unit_;
   CodeGenerator* const codegen_;
   CompilerDriver* const compiler_driver_;
-  const size_t total_number_of_dex_registers_;
   const size_t depth_;
   size_t number_of_inlined_instructions_;
   StackHandleScopeCollection* const handles_;