A64: Synchronize with r16024.

src/lithium.cc

Index: src/lithium.cc
diff --git a/src/lithium.cc b/src/lithium.cc
index 9e3ffe2ccbf8996db0d53e11d2c93606bfd1b33b..269a1b84ab246e7857a25ec6dea0b7c7dc0dcfe0 100644
--- a/src/lithium.cc
+++ b/src/lithium.cc
@@ -428,7 +428,7 @@ LChunk* LChunk::NewChunk(HGraph* graph) {
   int values = graph->GetMaximumValueID();
   CompilationInfo* info = graph->info();
   if (values > LUnallocated::kMaxVirtualRegisters) {
-    info->set_bailout_reason("not enough virtual registers for values");
+    info->set_bailout_reason(kNotEnoughVirtualRegistersForValues);
     return NULL;
   }
   LAllocator allocator(values, graph);
@@ -437,7 +437,7 @@ LChunk* LChunk::NewChunk(HGraph* graph) {
   if (chunk == NULL) return NULL;
 
   if (!allocator.Allocate(chunk)) {
-    info->set_bailout_reason("not enough virtual registers (regalloc)");
+    info->set_bailout_reason(kNotEnoughVirtualRegistersRegalloc);
     return NULL;
   }