Renamed "symbols" to "internalized strings" throughout the code base,

src/x64/code-stubs-x64.h

Index: src/x64/code-stubs-x64.h
diff --git a/src/x64/code-stubs-x64.h b/src/x64/code-stubs-x64.h
index 71cef58434fb361a4f206faa816abf31221fbda2..f2ea8b274fd48e33ec0b1d4d139d882eae2173ba 100644
--- a/src/x64/code-stubs-x64.h
+++ b/src/x64/code-stubs-x64.h
@@ -172,11 +172,11 @@ class StringHelper : public AllStatic {
                                         bool ascii);
 
 
-  // Probe the symbol table for a two character string. If the string is
+  // Probe the string table for a two character string. If the string is
   // not found by probing a jump to the label not_found is performed. This jump
-  // does not guarantee that the string is not in the symbol table. If the
+  // does not guarantee that the string is not in the string table. If the
   // string is found the code falls through with the string in register rax.
-  static void GenerateTwoCharacterSymbolTableProbe(MacroAssembler* masm,
+  static void GenerateTwoCharacterStringTableProbe(MacroAssembler* masm,
                                                    Register c1,
                                                    Register c2,
                                                    Register scratch1,