Rename Environment.global to Environment.forImport

The previous name was misleading, since the environment could exist in
a nested context and thus contain local members.

Author: nex3

lib/src/async_environment.dart

@@ -209,11 +209,11 @@ class AsyncEnvironment {
       _mixins.toList(),
       _content);
 
-  /// Returns a new global environment.
+  /// Returns a new environment to use for an imported file.
   ///
-  /// The returned environment shares this environment's global variables,
-  /// functions, and mixins, but not its modules.
-  AsyncEnvironment global() => AsyncEnvironment._(
+  /// The returned environment shares this environment's variables, functions,
+  /// and mixins, but not its modules.
+  AsyncEnvironment forImport() => AsyncEnvironment._(
       {},
       {},
       null,

lib/src/environment.dart

@@ -5,7 +5,7 @@
 // DO NOT EDIT. This file was generated from async_environment.dart.
 // See tool/grind/synchronize.dart for details.
 //
-// Checksum: b497eab76eb15ba7bfc4f1cecf71ff9f9c1fb2a5
+// Checksum: f02d694ae04ee7fb2219d7930049480eda1fd734
 //
 // ignore_for_file: unused_import
 
@@ -215,11 +215,11 @@ class Environment {
       _mixins.toList(),
       _content);
 
-  /// Returns a new global environment.
+  /// Returns a new environment to use for an imported file.
   ///
-  /// The returned environment shares this environment's global variables,
-  /// functions, and mixins, but not its modules.
-  Environment global() => Environment._(
+  /// The returned environment shares this environment's variables, functions,
+  /// and mixins, but not its modules.
+  Environment forImport() => Environment._(
       {},
       {},
       null,

lib/src/visitor/async_evaluate.dart

@@ -1383,7 +1383,7 @@ class _EvaluateVisitor
       }
 
       List<ModifiableCssNode> children;
-      var environment = _environment.global();
+      var environment = _environment.forImport();
       await _withEnvironment(environment, () async {
         var oldImporter = _importer;
         var oldStylesheet = _stylesheet;

lib/src/visitor/evaluate.dart

@@ -5,7 +5,7 @@
 // DO NOT EDIT. This file was generated from async_evaluate.dart.
 // See tool/grind/synchronize.dart for details.
 //
-// Checksum: eb095e782e2983223945d189caadc649b081a676
+// Checksum: a5181b80dae7d37a33d231ca4a50487d204bb8c3
 //
 // ignore_for_file: unused_import
 
@@ -1380,7 +1380,7 @@ class _EvaluateVisitor
       }
 
       List<ModifiableCssNode> children;
-      var environment = _environment.global();
+      var environment = _environment.forImport();
       _withEnvironment(environment, () {
         var oldImporter = _importer;
         var oldStylesheet = _stylesheet;