Add HasProperty code stub that tries simple lookups or jumps to runtime otherwise.

src/full-codegen/full-codegen.h

Index: src/full-codegen/full-codegen.h
diff --git a/src/full-codegen/full-codegen.h b/src/full-codegen/full-codegen.h
index 4f4b520c255462381792c5c26372cf2d88ad8fec..4a30730649f6ce4d9249f348dcd5ffc8171ac8fa 100644
--- a/src/full-codegen/full-codegen.h
+++ b/src/full-codegen/full-codegen.h
@@ -537,6 +537,12 @@ class FullCodeGenerator: public AstVisitor {
 
   void EmitIntrinsicAsStubCall(CallRuntime* expr, const Callable& callable);
 
+  // Emits call to respective code stub.
+  void EmitHasProperty();
+
+  // Platform-specific code for restoring context from current JS frame.
+  void RestoreContext();
+
   // Platform-specific code for loading variables.
   void EmitLoadGlobalCheckExtensions(VariableProxy* proxy,
                                      TypeofMode typeof_mode, Label* slow);