[debugger] introduce abstract interface for break location.

src/arm/assembler-arm-inl.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 243 matching lines @@
          IsRuntimeEntry(rmode_) || IsExternalReference(rmode_) ||
          IsInternalReference(rmode_));
   if (IsInternalReference(rmode_)) {
     Memory::Address_at(pc_) = NULL;
   } else {
     Assembler::set_target_address_at(isolate_, pc_, host_, NULL);
   }
 }
 
 
-bool RelocInfo::IsPatchedReturnSequence() {
-  Instr current_instr = Assembler::instr_at(pc_);
-  Instr next_instr = Assembler::instr_at(pc_ + Assembler::kInstrSize);
-  // A patched return sequence is:
-  //  ldr ip, [pc, #0]
-  //  blx ip
-  return Assembler::IsLdrPcImmediateOffset(current_instr) &&
-         Assembler::IsBlxReg(next_instr);
-}
-
-
-bool RelocInfo::IsPatchedDebugBreakSlotSequence() {
-  Instr current_instr = Assembler::instr_at(pc_);
-  return !Assembler::IsNop(current_instr, Assembler::DEBUG_BREAK_NOP);
-}
-
-
 void RelocInfo::Visit(Isolate* isolate, ObjectVisitor* visitor) {
   RelocInfo::Mode mode = rmode();
   if (mode == RelocInfo::EMBEDDED_OBJECT) {
     visitor->VisitEmbeddedPointer(this);
   } else if (RelocInfo::IsCodeTarget(mode)) {
     visitor->VisitCodeTarget(this);
   } else if (mode == RelocInfo::CELL) {
     visitor->VisitCell(this);
   } else if (mode == RelocInfo::EXTERNAL_REFERENCE) {
     visitor->VisitExternalReference(this);
@@ skipping 329 matching lines @@
       Assembler::FlushICache(isolate, pc, 4 * kInstrSize);
     }
   }
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_ARM_ASSEMBLER_ARM_INL_H_