parser: fix build on solaris

`FS` is defined in `regset.h` on solaris and smartos.

BUG=
R=ulan@chromium.org, danno@chromium.org

Review URL: https://codereview.chromium.org/176403004

Patch from Fedor Indutny <fedor.indutny@gmail.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19602 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/parser.h

@@ -427,16 +427,16 @@ class ParserTraits {
   explicit ParserTraits(Parser* parser) : parser_(parser) {}
 
   // Custom operations executed when FunctionStates are created and destructed.
-  template<typename FS>
-  static void SetUpFunctionState(FS* function_state, Zone* zone) {
+  template<typename FunctionState>
+  static void SetUpFunctionState(FunctionState* function_state, Zone* zone) {
     Isolate* isolate = zone->isolate();
     function_state->isolate_ = isolate;
     function_state->saved_ast_node_id_ = isolate->ast_node_id();
     isolate->set_ast_node_id(BailoutId::FirstUsable().ToInt());
   }
 
-  template<typename FS>
-  static void TearDownFunctionState(FS* function_state) {
+  template<typename FunctionState>
+  static void TearDownFunctionState(FunctionState* function_state) {
     if (function_state->outer_function_state_ != NULL) {
       function_state->isolate_->set_ast_node_id(
           function_state->saved_ast_node_id_);

src/preparser.h

@@ -644,10 +644,10 @@ class PreParserTraits {
 
   // Custom operations executed when FunctionStates are created and
   // destructed. (The PreParser doesn't need to do anything.)
-  template<typename FS>
-  static void SetUpFunctionState(FS* function_state, void*) {}
-  template<typename FS>
-  static void TearDownFunctionState(FS* function_state) {}
+  template<typename FunctionState>
+  static void SetUpFunctionState(FunctionState* function_state, void*) {}
+  template<typename FunctionState>
+  static void TearDownFunctionState(FunctionState* function_state) {}
 
   // Helper functions for recursive descent.
   static bool IsEvalOrArguments(PreParserIdentifier identifier) {