Add stats support for existing optimizations

This patch adds support for the --dump-stats facility with existing
optimizations.

Change-Id: I68751b119a030952a11057cb651a3c63e87e73ea
Signed-off-by: Jean-Philippe Halimi <jean-philippe.halimi@intel.com>
diff --git a/compiler/optimizing/constant_folding.h b/compiler/optimizing/constant_folding.h
index 2698b2d..df89371 100644
--- a/compiler/optimizing/constant_folding.h
+++ b/compiler/optimizing/constant_folding.h
@@ -32,8 +32,10 @@
  */
 class HConstantFolding : public HOptimization {
  public:
-  explicit HConstantFolding(HGraph* graph, const char* name = kConstantFoldingPassName)
-      : HOptimization(graph, name) {}
+  HConstantFolding(HGraph* graph,
+                   OptimizingCompilerStats* stats,
+                   const char* name = kConstantFoldingPassName)
+      : HOptimization(graph, name, stats) {}
 
   void Run() OVERRIDE;