Rollback one from Testing change for failing unit test

src/ia32/debug-ia32.cc

Index: src/ia32/debug-ia32.cc
diff --git a/src/ia32/debug-ia32.cc b/src/ia32/debug-ia32.cc
index fa137fcc03c67773c5b10b41dce18790d303288c..dfa663420016c2a7e9202d8c1bd2813c89928031 100644
--- a/src/ia32/debug-ia32.cc
+++ b/src/ia32/debug-ia32.cc
@@ -265,10 +265,9 @@ void Debug::GeneratePlainReturnLiveEdit(MacroAssembler* masm) {
 //   -- context
 //   -- frame base
 void Debug::GenerateFrameDropperLiveEdit(MacroAssembler* masm) {
-  // Temporary disabled for failing test investigation.
-  //ExternalReference restarter_frame_function_slot =
-  //    ExternalReference(Debug_Address::RestarterFrameFunctionPointer());
-  //__ mov(Operand::StaticVariable(restarter_frame_function_slot), Immediate(0));
+  ExternalReference restarter_frame_function_slot =
+      ExternalReference(Debug_Address::RestarterFrameFunctionPointer());
+  __ mov(Operand::StaticVariable(restarter_frame_function_slot), Immediate(0));
 
   // We do not know our frame height, but set esp based on ebp.
   __ lea(esp, Operand(ebp, -4 * kPointerSize));