More precise break points and stepping when debugging...

src/arm/codegen-arm.cc

Index: src/arm/codegen-arm.cc
===================================================================
--- src/arm/codegen-arm.cc	(revision 4816)
+++ src/arm/codegen-arm.cc	(working copy)
@@ -386,8 +386,10 @@
       // the add instruction the add will generate two instructions.
       int return_sequence_length =
           masm_->InstructionsGeneratedSince(&check_exit_codesize);
-      CHECK(return_sequence_length == Assembler::kJSReturnSequenceLength ||
-            return_sequence_length == Assembler::kJSReturnSequenceLength + 1);
+      CHECK(return_sequence_length ==
+            Assembler::kJSReturnSequenceInstructions ||
+            return_sequence_length ==
+            Assembler::kJSReturnSequenceInstructions + 1);
 #endif
     }
   }