Rename some service protocol errors.

runtime/vm/json_stream.cc

Index: runtime/vm/json_stream.cc
diff --git a/runtime/vm/json_stream.cc b/runtime/vm/json_stream.cc
index efb1290cddbb62409d6677ef39b67639dbe86214..2470d19c4ff47890b38f895e305b5fd0d0de8ee7 100644
--- a/runtime/vm/json_stream.cc
+++ b/runtime/vm/json_stream.cc
@@ -95,14 +95,12 @@ static const char* GetJSONRpcErrorMessage(intptr_t code) {
       return "Invalid params";
     case kInternalError:
       return "Internal error";
+    case kFeatureDisabled:
+      return "Feature is disabled";
     case kVMMustBePaused:
       return "VM must be paused";
-    case kNoBreakAtLine:
-      return "Cannot set breakpoint at line";
-    case kNoBreakAtFunction:
-      return "Cannot set breakpoint at function";
-    case kProfilingDisabled:
-      return "Profiling is disabled";
+    case kCannotAddBreakpoint:
+      return "Cannot add breakpoint";
     default:
       UNIMPLEMENTED();
       return "Unexpected rpc error code";