Rename devcompiler to ddc

The value 'devcompiler' is never being passed to this argument so this
will not break any known use cases. The name 'ddc' has better
consistency with how we label SDK platforms in `build_runner`.

Bug: https://github.com/dart-lang/build/issues/2174
Change-Id: I95f6cb75ec86c2f276298781443203d201550815
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/99704
Reviewed-by: Jake Macdonald <jakemac@google.com>
Commit-Queue: Nate Bosch <nbosch@google.com>
diff --git a/utils/bazel/kernel_worker.dart b/utils/bazel/kernel_worker.dart
index 3723077..f288208 100644
--- a/utils/bazel/kernel_worker.dart
+++ b/utils/bazel/kernel_worker.dart
@@ -107,8 +107,8 @@
       negatable: true,
       help: 'Whether to only build summary files.')
   ..addOption('target',
-      allowed: const ['vm', 'dart2js', 'devcompiler'],
-      help: 'Build kernel for the vm, dart2js, or devcompiler')
+      allowed: const ['vm', 'dart2js', 'ddc'],
+      help: 'Build kernel for the vm, dart2js, or ddc')
   ..addOption('dart-sdk-summary')
   ..addMultiOption('input-summary')
   ..addMultiOption('input-linked')
@@ -166,7 +166,7 @@
   // TODO(sigmund,jakemac): make target mandatory. We allow null to be backwards
   // compatible while we migrate existing clients of this tool.
   var targetName =
-      (parsedArgs['target'] as String) ?? (summaryOnly ? 'devcompiler' : 'vm');
+      (parsedArgs['target'] as String) ?? (summaryOnly ? 'ddc' : 'vm');
   var targetFlags = new TargetFlags();
   Target target;
   switch (targetName) {
@@ -183,13 +183,13 @@
             'error: --summary-only not supported for the dart2js target');
       }
       break;
-    case 'devcompiler':
+    case 'ddc':
       // TODO(jakemac):If `generateKernel` changes to return a summary
       // component, process the component instead.
       target = new DevCompilerSummaryTarget(sources, excludeNonSources);
       if (!summaryOnly) {
         out.writeln('error: --no-summary-only not supported for the '
-            'devcompiler target');
+            'ddc target');
       }
       break;
     default: