[turbofan] Various cleanups.

src/compiler/js-builtin-reducer.cc

Index: src/compiler/js-builtin-reducer.cc
diff --git a/src/compiler/js-builtin-reducer.cc b/src/compiler/js-builtin-reducer.cc
index 28580a1a3d912f3bd733d0580755d44a8d4708e3..263b0feedda04949e0f83843996da6a51eea86d4 100644
--- a/src/compiler/js-builtin-reducer.cc
+++ b/src/compiler/js-builtin-reducer.cc
@@ -5,6 +5,7 @@
 #include "src/compiler/diamond.h"
 #include "src/compiler/graph-inl.h"
 #include "src/compiler/js-builtin-reducer.h"
+#include "src/compiler/js-graph.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties-inl.h"
 #include "src/types.h"
@@ -96,6 +97,10 @@ class JSCallReduction {
 };
 
 
+JSBuiltinReducer::JSBuiltinReducer(JSGraph* jsgraph)
+    : jsgraph_(jsgraph), simplified_(jsgraph->zone()) {}
+
+
 // ECMA-262, section 15.8.2.1.
 Reduction JSBuiltinReducer::ReduceMathAbs(Node* node) {
   JSCallReduction r(node);
@@ -232,6 +237,19 @@ Reduction JSBuiltinReducer::Reduce(Node* node) {
   return NoChange();
 }
 
+
+Graph* JSBuiltinReducer::graph() const { return jsgraph()->graph(); }
+
+
+CommonOperatorBuilder* JSBuiltinReducer::common() const {
+  return jsgraph()->common();
+}
+
+
+MachineOperatorBuilder* JSBuiltinReducer::machine() const {
+  return jsgraph()->machine();
+}
+
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8