Revert of PPC/s390: [debugger] remove debugger statement support from FCG/CS.

src/s390/macro-assembler-s390.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_S390_MACRO_ASSEMBLER_S390_H_
 #define V8_S390_MACRO_ASSEMBLER_S390_H_
 
 #include "src/assembler.h"
 #include "src/bailout-reason.h"
 #include "src/frames.h"
@@ skipping 928 matching lines @@
 
   void InvokeFunction(Handle<JSFunction> function,
                       const ParameterCount& expected,
                       const ParameterCount& actual, InvokeFlag flag,
                       const CallWrapper& call_wrapper);
 
   void IsObjectJSStringType(Register object, Register scratch, Label* fail);
 
   void IsObjectNameType(Register object, Register scratch, Label* fail);
 
-  // Frame restart support
+  // ---------------------------------------------------------------------------
+  // Debugger Support
+
+  void DebugBreak();
   void MaybeDropFrames();
 
+  // ---------------------------------------------------------------------------
   // Exception handling
 
   // Push a new stack handler and link into stack handler chain.
   void PushStackHandler();
 
   // Unlink the stack handler on top of the stack from the stack handler chain.
   // Must preserve the result register.
   void PopStackHandler();
 
   // ---------------------------------------------------------------------------
@@ skipping 887 matching lines @@
 inline MemOperand NativeContextMemOperand() {
   return ContextMemOperand(cp, Context::NATIVE_CONTEXT_INDEX);
 }
 
 #define ACCESS_MASM(masm) masm->
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_S390_MACRO_ASSEMBLER_S390_H_