[stubs] Consolidate TryToName implementation

src/compiler/code-assembler.h

Index: src/compiler/code-assembler.h
diff --git a/src/compiler/code-assembler.h b/src/compiler/code-assembler.h
index bea999b705627fb558a3f3de548b54e9b47dbb52..17319882ccb979aac392f7a887034ef069bbec21 100644
--- a/src/compiler/code-assembler.h
+++ b/src/compiler/code-assembler.h
@@ -283,6 +283,10 @@ class CodeAssembler {
   CODE_ASSEMBLER_UNARY_OP_LIST(DECLARE_CODE_ASSEMBLER_UNARY_OP)
 #undef DECLARE_CODE_ASSEMBLER_UNARY_OP
 
+  // Changes an intptr_t to a double, e.g. for storing an element index
+  // outside Smi range in a HeapNumber. Lossless on 32-bit,
+  // rounds on 64-bit (which doesn't affect valid element indices).
+  Node* RoundIntPtrToFloat64(Node* value);
   // No-op on 32-bit, otherwise zero extend.
   Node* ChangeUint32ToWord(Node* value);
   // No-op on 32-bit, otherwise sign extend.