[Interpreter] Add support for loading from / storing to outer context variables.

src/compiler/interpreter-assembler.cc

Index: src/compiler/interpreter-assembler.cc
diff --git a/src/compiler/interpreter-assembler.cc b/src/compiler/interpreter-assembler.cc
index 512bfb69e1fb5793646d83fc7587b0d80fe05cbe..8d470818f220c4b729e585f0299c8f5a7f935531 100644
--- a/src/compiler/interpreter-assembler.cc
+++ b/src/compiler/interpreter-assembler.cc
@@ -125,8 +125,9 @@ Node* InterpreterAssembler::LoadRegister(Node* reg_index) {
 
 
 Node* InterpreterAssembler::StoreRegister(Node* value, Node* reg_index) {
-  return raw_assembler_->Store(kMachAnyTagged, RegisterFileRawPointer(),
-                               RegisterFrameOffset(reg_index), value);
+  return raw_assembler_->Store(
+      StoreRepresentation(kMachAnyTagged, kNoWriteBarrier),
+      RegisterFileRawPointer(), RegisterFrameOffset(reg_index), value);
 }
 
 
@@ -316,7 +317,9 @@ Node* InterpreterAssembler::StoreContextSlot(Node* context, Node* slot_index,
   Node* offset =
       IntPtrAdd(WordShl(slot_index, kPointerSizeLog2),
                 Int32Constant(Context::kHeaderSize - kHeapObjectTag));
-  return raw_assembler_->Store(kMachAnyTagged, context, offset, value);
+  return raw_assembler_->Store(
+      StoreRepresentation(kMachAnyTagged, kFullWriteBarrier), context, offset,
+      value);
 }