Replace HCheckPrototypeMaps by explicit map checks of constant values.

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index daca61d12d183ce81cda8ab222b02d40857b6688..0b03ef7636e6c8b2ab71de4ec6dd7be3625850e2 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -1562,6 +1562,10 @@ class HGraphBuilder {
                                        int previous_object_size,
                                        HValue* payload);
 
+  void BuildConstantMapCheck(Handle<JSObject> constant, CompilationInfo* info);
+  void BuildCheckPrototypeMaps(Handle<JSObject> prototype,
+                               Handle<JSObject> holder);
+
   HInstruction* BuildGetNativeContext();
   HInstruction* BuildGetArrayFunction();