Rename the kinds of locations to be consistent with the (codegen)...

src/compiler.cc

Index: src/compiler.cc
===================================================================
--- src/compiler.cc	(revision 3167)
+++ src/compiler.cc	(working copy)
@@ -48,7 +48,7 @@
 
   CodeGenSelector()
       : has_supported_syntax_(true),
-        location_(Location::Nowhere()) {
+        location_(Location::Uninitialized()) {
   }
 
   CodeGenTag Select(FunctionLiteral* fun);
@@ -514,11 +514,11 @@
 
 
 void CodeGenSelector::VisitAsEffect(Expression* expr) {
-  if (location_.is_nowhere()) {
+  if (location_.is_effect()) {
     Visit(expr);
   } else {
     Location saved = location_;
-    location_ = Location::Nowhere();
+    location_ = Location::Effect();
     Visit(expr);
     location_ = saved;
   }
@@ -526,11 +526,11 @@
 
 
 void CodeGenSelector::VisitAsValue(Expression* expr) {
-  if (location_.is_temporary()) {
+  if (location_.is_value()) {
     Visit(expr);
   } else {
     Location saved = location_;
-    location_ = Location::Temporary();
+    location_ = Location::Value();
     Visit(expr);
     location_ = saved;
   }