[Interpreter] Avoid accessing Isolate from during bytecode generation.

test/unittests/interpreter/bytecode-peephole-optimizer-unittest.cc

Index: test/unittests/interpreter/bytecode-peephole-optimizer-unittest.cc
diff --git a/test/unittests/interpreter/bytecode-peephole-optimizer-unittest.cc b/test/unittests/interpreter/bytecode-peephole-optimizer-unittest.cc
index f8f599d3f121f59bd3ad87ff404b0f0ed8133b37..4f03c7c7ba1f7686ccf9e07d787948030ad8e440 100644
--- a/test/unittests/interpreter/bytecode-peephole-optimizer-unittest.cc
+++ b/test/unittests/interpreter/bytecode-peephole-optimizer-unittest.cc
@@ -39,13 +39,14 @@ class BytecodePeepholeOptimizerTest : public BytecodePipelineStage,
   void BindLabel(BytecodeLabel* label) override {}
   void BindLabel(const BytecodeLabel& target, BytecodeLabel* label) override {}
   Handle<BytecodeArray> ToBytecodeArray(
-      int fixed_register_count, int parameter_count,
+      Isolate* isolate, int fixed_register_count, int parameter_count,
       Handle<FixedArray> handle_table) override {
     return Handle<BytecodeArray>();
   }
 
   void Flush() {
-    optimizer()->ToBytecodeArray(0, 0, factory()->empty_fixed_array());
+    optimizer()->ToBytecodeArray(isolate(), 0, 0,
+                                 factory()->empty_fixed_array());
   }
 
   BytecodePeepholeOptimizer* optimizer() { return &peephole_optimizer_; }