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

src/mips/lithium-mips.h

Index: src/mips/lithium-mips.h
diff --git a/src/mips/lithium-mips.h b/src/mips/lithium-mips.h
index 44c909ea766f2a3f5603a1118c55e57ca3dd6cba..4c329d9c75ba3f685c04ccb228fd5775e47b9edd 100644
--- a/src/mips/lithium-mips.h
+++ b/src/mips/lithium-mips.h
@@ -2642,7 +2642,7 @@ class LChunkBuilder BASE_EMBEDDED {
   bool is_done() const { return status_ == DONE; }
   bool is_aborted() const { return status_ == ABORTED; }
 
-  void Abort(const char* reason);
+  void Abort(BailoutReason reason);
 
   // Methods for getting operands for Use / Define / Temp.
   LUnallocated* ToUnallocated(Register reg);