Refactor BreakLocationIterator.

src/mips64/assembler-mips64.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 567 matching lines @@
 
   // Difference between address of current opcode and value read from pc
   // register.
   static const int kPcLoadDelta = 4;
 
   static const int kPatchDebugBreakSlotReturnOffset = 6 * kInstrSize;
 
   // Number of instructions used for the JS return sequence. The constant is
   // used by the debugger to patch the JS return sequence.
   static const int kJSReturnSequenceInstructions = 7;
+  static const int kJSReturnSequenceLength =
+      kJSReturnSequenceInstructions * kInstrSize;
   static const int kDebugBreakSlotInstructions = 6;
   static const int kDebugBreakSlotLength =
       kDebugBreakSlotInstructions * kInstrSize;
 
 
   // ---------------------------------------------------------------------------
   // Code generation.
 
   // Insert the smallest number of nop instructions
   // possible to align the pc offset to a multiple
@@ skipping 830 matching lines @@
 class EnsureSpace BASE_EMBEDDED {
  public:
   explicit EnsureSpace(Assembler* assembler) {
     assembler->CheckBuffer();
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_ASSEMBLER_MIPS_H_