Remove unused StubType's, freeing 2 bits in Code objects.

src/x64/stub-cache-x64.cc

Index: src/x64/stub-cache-x64.cc
diff --git a/src/x64/stub-cache-x64.cc b/src/x64/stub-cache-x64.cc
index a1e8f211161e9c42cbfeffa0f9d9d3eb9818bcae..4c61f245a9582f7339676a89c5457356e0ee6233 100644
--- a/src/x64/stub-cache-x64.cc
+++ b/src/x64/stub-cache-x64.cc
@@ -1595,7 +1595,7 @@ Handle<Code> CallStubCompiler::CompileCallField(Handle<JSObject> object,
   GenerateMissBranch();
 
   // Return the generated code.
-  return GetCode(Code::FIELD, name);
+  return GetCode(Code::FAST, name);
 }
 
 
@@ -2652,7 +2652,7 @@ Handle<Code> CallStubCompiler::CompileCallConstant(
     Handle<Code> code = CompileCustomCall(object, holder,
                                           Handle<PropertyCell>::null(),
                                           function, Handle<String>::cast(name),
-                                          Code::CONSTANT);
+                                          Code::FAST);
     // A null handle means bail out to the regular compiler code below.
     if (!code.is_null()) return code;
   }
@@ -2720,7 +2720,7 @@ Handle<Code> CallStubCompiler::CompileCallInterceptor(Handle<JSObject> object,
   GenerateMissBranch();
 
   // Return the generated code.
-  return GetCode(Code::INTERCEPTOR, name);
+  return GetCode(Code::FAST, name);
 }
 
 
@@ -2808,7 +2808,7 @@ Handle<Code> StoreStubCompiler::CompileStoreCallback(
   __ TailCallExternalReference(store_callback_property, 4, 1);
 
   // Return the generated code.
-  return GetCode(kind(), Code::CALLBACKS, name);
+  return GetCode(kind(), Code::FAST, name);
 }
 
 
@@ -2824,7 +2824,7 @@ Handle<Code> StoreStubCompiler::CompileStoreCallback(
       masm(), call_optimization, receiver(), scratch3(), 1, values);
 
   // Return the generated code.
-  return GetCode(kind(), Code::CALLBACKS, name);
+  return GetCode(kind(), Code::FAST, name);
 }
 
 
@@ -2891,7 +2891,7 @@ Handle<Code> StoreStubCompiler::CompileStoreInterceptor(
   __ TailCallExternalReference(store_ic_property, 4, 1);
 
   // Return the generated code.
-  return GetCode(kind(), Code::INTERCEPTOR, name);
+  return GetCode(kind(), Code::FAST, name);
 }
 
 
@@ -2943,7 +2943,7 @@ Handle<Code> LoadStubCompiler::CompileLoadNonexistent(
   __ ret(0);
 
   // Return the generated code.
-  return GetCode(kind(), Code::NONEXISTENT, name);
+  return GetCode(kind(), Code::FAST, name);
 }