Move common identifiers, names and selectors to a separate library.

pkg/compiler/lib/src/inferrer/type_graph_nodes.dart

Index: pkg/compiler/lib/src/inferrer/type_graph_nodes.dart
diff --git a/pkg/compiler/lib/src/inferrer/type_graph_nodes.dart b/pkg/compiler/lib/src/inferrer/type_graph_nodes.dart
index 51c39f58df7681c92c6fb1f14fd291858a2b4775..900bd4796113c2e5f59a81b87b6b6ee86f0134fe 100644
--- a/pkg/compiler/lib/src/inferrer/type_graph_nodes.dart
+++ b/pkg/compiler/lib/src/inferrer/type_graph_nodes.dart
@@ -550,8 +550,8 @@ class ParameterTypeInformation extends ElementTypeInformation {
       return safeType(inferrer);
     }
     if (function.isInstanceMember &&
-        (function.name == Compiler.NO_SUCH_METHOD ||
-        (function.name == Compiler.CALL_OPERATOR_NAME &&
+        (function.name == Identifiers.noSuchMethod_ ||
+        (function.name == Identifiers.call &&
          disableInferenceForClosures))) {
       // Do not infer types for parameters of [noSuchMethod] and
       // [call] instance methods.
@@ -767,7 +767,7 @@ class DynamicCallSiteTypeInformation extends CallSiteTypeInformation {
     return targets.any((Element e) {
       return e is FunctionElement &&
              e.isInstanceMember &&
-             e.name == Compiler.NO_SUCH_METHOD &&
+             e.name == Identifiers.noSuchMethod_ &&
              inferrer.backend.isComplexNoSuchMethod(e);
     });
   }