Fix `dt serve` command as part of the release process (#9603)

tool/lib/commands/serve.dart

diff --git a/tool/lib/commands/serve.dart b/tool/lib/commands/serve.dart
index 722229c..6e3243e 100644
--- a/tool/lib/commands/serve.dart
+++ b/tool/lib/commands/serve.dart
@@ -154,7 +154,8 @@
         results[SharedCommandArgs.updatePerfetto.flagName] as bool;
     final useWasm = results[SharedCommandArgs.wasm.flagName] as bool;
     final noStripWasm = results[SharedCommandArgs.noStripWasm.flagName] as bool;
-    final noMinifyWasm = results[SharedCommandArgs.noMinifyWasm.flagName] as bool;
+    final noMinifyWasm =
+        results[SharedCommandArgs.noMinifyWasm.flagName] as bool;
     final runPubGet = results[SharedCommandArgs.pubGet.flagName] as bool;
     final devToolsAppBuildMode =
         results[SharedCommandArgs.buildMode.flagName] as String;
@@ -241,10 +242,10 @@
       logStatus('completed building DevTools: $devToolsBuildLocation');
     }
 
-    logStatus('running pub get for DDS in the local dart sdk');
+    logStatus('running gclient sync in the local dart sdk');
     await processManager.runProcess(
-      CliCommand.dart(['pub', 'get']),
-      workingDirectory: path.join(localDartSdkLocation, 'pkg', 'dds'),
+      CliCommand.gclient(['sync']),
+      workingDirectory: localDartSdkLocation,
     );
 
     logStatus('serving DevTools with a local devtools server...');

tool/lib/utils.dart

diff --git a/tool/lib/utils.dart b/tool/lib/utils.dart
index e0c15a8..467bea8 100644
--- a/tool/lib/utils.dart
+++ b/tool/lib/utils.dart
@@ -81,6 +81,14 @@
     return CliCommand('git', args, throwOnException: throwOnException);
   }
 
+  /// CliCommand helper for running gclient commands.
+  factory CliCommand.gclient(
+    List<String> args, {
+    bool throwOnException = true,
+  }) {
+    return CliCommand('gclient', args, throwOnException: throwOnException);
+  }
+
   factory CliCommand.tool(List<String> args, {bool throwOnException = true}) {
     var toolPath = Platform.script.toFilePath();
     if (!File(toolPath).existsSync()) {