Mark Dartium and content shell as isDartVM.

Also rename TestPlatform.isDartVm to isDartVM to match the style guide
for two-letter acronyms.

R=kevmoo@google.com

Review URL: https://codereview.chromium.org//1269833003 .

CHANGELOG.md

@@ -6,6 +6,9 @@
 
 * Add a `Timeout.none` value indicating that a test should never time out.
 
+* The `dart-vm` platform selector variable is now `true` for Dartium and content
+  shell.
+
 ## 0.12.3+8
 
 * Fix an uncaught error that could crop up when killing the test runner process

lib/src/backend/platform_selector/evaluator.dart

@@ -26,7 +26,7 @@ class Evaluator implements Visitor<bool> {
     if (node.name == _os.name) return true;
 
     switch (node.name) {
-      case "dart-vm": return _platform.isDartVm;
+      case "dart-vm": return _platform.isDartVM;
       case "browser": return _platform.isBrowser;
       case "js": return _platform.isJS;
       case "blink": return _platform.isBlink;

lib/src/backend/test_platform.dart

@@ -12,16 +12,16 @@ class TestPlatform {
 
   /// The command-line Dart VM.
   static const TestPlatform vm =
-      const TestPlatform._("VM", "vm", isDartVm: true);
+      const TestPlatform._("VM", "vm", isDartVM: true);
 
   /// Dartium.
   static const TestPlatform dartium = const TestPlatform._("Dartium", "dartium",
-      isBrowser: true, isBlink: true);
+      isBrowser: true, isBlink: true, isDartVM: true);
 
   /// Dartium content shell.
   static const TestPlatform contentShell = const TestPlatform._(
       "Dartium Content Shell", "content-shell",
-      isBrowser: true, isBlink: true);
+      isBrowser: true, isBlink: true, isDartVM: true);
 
   /// Google Chrome.
   static const TestPlatform chrome = const TestPlatform._("Chrome", "chrome",
@@ -71,7 +71,7 @@ class TestPlatform {
   final String identifier;
 
   /// Whether this platform runs the Dart VM in any capacity.
-  final bool isDartVm;
+  final bool isDartVM;
 
   /// Whether this platform is a browser.
   final bool isBrowser;
@@ -82,7 +82,7 @@ class TestPlatform {
   /// Whether this platform uses the Blink rendering engine.
   final bool isBlink;
 
-  const TestPlatform._(this.name, this.identifier, {this.isDartVm: false,
+  const TestPlatform._(this.name, this.identifier, {this.isDartVM: false,
       this.isBrowser: false, this.isJS: false, this.isBlink: false});
 
   String toString() => name;