Extract hardcoded error strings into a single place and replace them with enum.

src/ia32/macro-assembler-ia32.h

Index: src/ia32/macro-assembler-ia32.h
diff --git a/src/ia32/macro-assembler-ia32.h b/src/ia32/macro-assembler-ia32.h
index 3bca930d6671ad1e7b5985277b9ee668213881bb..36178a5ac4e424f1b960515be662fe53af062208 100644
--- a/src/ia32/macro-assembler-ia32.h
+++ b/src/ia32/macro-assembler-ia32.h
@@ -844,15 +844,15 @@ class MacroAssembler: public Assembler {
 
   // Calls Abort(msg) if the condition cc is not satisfied.
   // Use --debug_code to enable.
-  void Assert(Condition cc, const char* msg);
+  void Assert(Condition cc, BailoutReason reason);
 
   void AssertFastElements(Register elements);
 
   // Like Assert(), but always enabled.
-  void Check(Condition cc, const char* msg);
+  void Check(Condition cc, BailoutReason reason);
 
   // Print a message to stdout and abort execution.
-  void Abort(const char* msg);
+  void Abort(BailoutReason reason);
 
   // Check that the stack is aligned.
   void CheckStackAlignment();