fix #27607, add dev_compiler summary to the SDK and move JS files

pkg/dev_compiler/web/web_command.dart

Index: pkg/dev_compiler/web/web_command.dart
diff --git a/pkg/dev_compiler/web/web_command.dart b/pkg/dev_compiler/web/web_command.dart
index 68b216a7ddb01eb71f9c96ac9432e6d73ec33653..bc4c1ad3d2dddeb1a9a38d682b8da0e3c18fd0a6 100644
--- a/pkg/dev_compiler/web/web_command.dart
+++ b/pkg/dev_compiler/web/web_command.dart
@@ -197,11 +197,13 @@ class WebCompileCommand extends Command {
 
       JSModuleFile module = compiler.compile(unit, compilerOptions);
 
-      var moduleCode = module.isValid
-          ? module
-              .getCode(ModuleFormat.legacy, true, unit.name, unit.name + '.map')
-              .code
-          : '';
+      var moduleCode = '';
+      if (module.isValid) {
+        moduleCode = module
+            .getCode(ModuleFormat.legacy, unit.name, unit.name + '.map',
+                singleOutFile: true)
+            .code;
+      }
 
       return new CompileResult(
           code: moduleCode, isValid: module.isValid, errors: module.errors);