Reland "Postpone termination exceptions in debug scope."

src/debug.h

 // Copyright 2012 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_DEBUG_H_
 #define V8_DEBUG_H_
 
 #include "src/allocation.h"
 #include "src/arguments.h"
 #include "src/assembler.h"
@@ skipping 684 matching lines @@
 
  private:
   Isolate* isolate() { return debug_->isolate_; }
 
   Debug* debug_;
   DebugScope* prev_;               // Previous scope if entered recursively.
   StackFrame::Id break_frame_id_;  // Previous break frame id.
   int break_id_;                   // Previous break id.
   bool failed_;                    // Did the debug context fail to load?
   SaveContext save_;               // Saves previous context.
+  PostponeInterruptsScope no_termination_exceptons_;
 };
 
 
 // Stack allocated class for disabling break.
 class DisableBreak BASE_EMBEDDED {
  public:
   explicit DisableBreak(Debug* debug, bool disable_break)
     : debug_(debug), old_state_(debug->break_disabled_) {
     debug_->break_disabled_ = disable_break;
   }
@@ skipping 42 matching lines @@
   // several frames above.
   // There is no calling conventions here, because it never actually gets
   // called, it only gets returned to.
   static void GenerateFrameDropperLiveEdit(MacroAssembler* masm);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_DEBUG_H_