[Interpreter] Move context chain search loop to handler

src/interpreter/interpreter.h

Index: src/interpreter/interpreter.h
diff --git a/src/interpreter/interpreter.h b/src/interpreter/interpreter.h
index fda8b5f387daf032c5633b3beb82883adc3deba3..de161c951e1823fb0fa18afe145a371f4f59a8ed 100644
--- a/src/interpreter/interpreter.h
+++ b/src/interpreter/interpreter.h
@@ -136,6 +136,12 @@ class Interpreter {
   void DoStaLookupSlot(LanguageMode language_mode,
                        InterpreterAssembler* assembler);
 
+  // Generates code to get a context at a given |depth| from the given
+  // |root_context|.

[Michael Starzinger, 2016/09/13 09:53:08]

nit: The name "root_context" sounds misleading because "root" sounds as it would
be the end of the chain (i.e. the native context). Please just use plain
"context" for the variable/parameter name instead. This is in sync with the rest
of the code.

[Leszek Swirski, 2016/09/13 10:17:51]

Done (actually, this was a leftover definition from a refactor, so removed
entirely).

+  compiler::Node* GetContextAtDepth(InterpreterAssembler* assembler,
+                                    compiler::Node* root_context,
+                                    compiler::Node* depth);
+
   // Generates code to load a context slot.
   compiler::Node* BuildLoadContextSlot(InterpreterAssembler* assembler);