Remove VariableScope, Scope.lexicalLookup and Scope.inStaticContext

lib/compiler/implementation/warnings.dart

Index: lib/compiler/implementation/warnings.dart
diff --git a/lib/compiler/implementation/warnings.dart b/lib/compiler/implementation/warnings.dart
index 9d00fd40836590cf7ead34a5c197dc25c50e97ec..58f38fabe205041244ddf3b7a5fd8a5c0f5adbe6 100644
--- a/lib/compiler/implementation/warnings.dart
+++ b/lib/compiler/implementation/warnings.dart
@@ -175,6 +175,9 @@ class MessageKind {
   static const CANNOT_INSTANTIATE_TYPEDEF = const MessageKind(
       "cannot instantiate typedef '#{1}'");
 
+  static const CANNOT_INSTANTIATE_TYPE_VARIABLE = const MessageKind(
+      "cannot instantiate type variable '#{1}'");
+
   static const NO_DEFAULT_CLASS = const MessageKind(
       "no default class on enclosing interface '#{1}'");
 
@@ -299,7 +302,7 @@ Length: #{3}''');
   static const PATCH_PARAMETER_MISMATCH = const MessageKind(
       "Patch method parameter '#{3}' doesn't match '#{2}' on origin method "
       "#{1}.");
-  
+
   static const TOP_LEVEL_VARIABLE_DECLARED_STATIC = const MessageKind(
       "Top-level variable cannot be declared static.");