Create frequently used symbols in the vm isolate

vm/dart_api_impl.cc

Index: vm/dart_api_impl.cc
===================================================================
--- vm/dart_api_impl.cc	(revision 9829)
+++ vm/dart_api_impl.cc	(working copy)
@@ -24,6 +24,7 @@
 #include "vm/port.h"
 #include "vm/resolver.h"
 #include "vm/stack_frame.h"
+#include "vm/symbols.h"
 #include "vm/timer.h"
 #include "vm/unicode.h"
 #include "vm/verifier.h"
@@ -1121,7 +1122,7 @@
   const String& class_name =
       String::Handle(isolate, isolate_lib.PrivateName(public_class_name));
   const String& function_name =
-      String::Handle(isolate, String::NewSymbol("_get_or_create"));
+      String::Handle(isolate, Symbols::New("_get_or_create"));
   const int kNumArguments = 1;
   const Array& kNoArgumentNames = Array::Handle(isolate);
   const Function& function = Function::Handle(
@@ -2582,7 +2583,7 @@
 
 
 static RawString* AddExternalSetterSuffix(const String& name) {
-  const String& equals = String::Handle(String::NewSymbol("="));
+  const String& equals = String::Handle(Symbols::New("="));
   return String::Concat(name, equals);
 }
 
@@ -2697,7 +2698,7 @@
     // Case 4.  Lookup the function with a . appended to find the
     // unnamed constructor.
     if (func.IsNull()) {
-      const String& dot = String::Handle(String::NewSymbol("."));
+      const String& dot = String::Handle(Symbols::Dot());
       tmp_name = String::Concat(func_name, dot);
       func = cls.LookupFunction(tmp_name);
     }
@@ -3091,9 +3092,9 @@
   const Object& name_obj =
       Object::Handle(isolate, Api::UnwrapHandle(constructor_name));
   if (name_obj.IsNull()) {
-    dot_name = String::NewSymbol(".");
+    dot_name = Symbols::Dot();
   } else if (name_obj.IsString()) {
-    const String& dot = String::Handle(isolate, String::NewSymbol("."));
+    const String& dot = String::Handle(isolate, Symbols::Dot());
     dot_name = String::Concat(dot, String::Cast(name_obj));
   } else {
     return Api::NewError(
@@ -3610,7 +3611,7 @@
   }
   String& cls_name = String::Handle(isolate);
   cls_name ^= param.raw();
-  cls_name = String::NewSymbol(cls_name);
+  cls_name = Symbols::New(cls_name);
   Library& lib = Library::Handle(isolate);
   lib ^= Api::UnwrapHandle(library);
   if (lib.IsNull()) {