Fix leaked script in cc/EmbeddedScript.

runtime/tests/vm/vm.status

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # Issue 28198
 cc/IsolateReload_PendingUnqualifiedCall_InstanceToStatic: Fail, Crash, Timeout
 cc/IsolateReload_PendingUnqualifiedCall_StaticToInstance: Fail, Crash, Timeout
 cc/IsolateReload_PendingConstructorCall_AbstractToConcrete: Fail, Crash, Timeout
 cc/IsolateReload_PendingConstructorCall_ConcreteToAbstract: Fail, Crash, Timeout
 cc/IsolateReload_PendingStaticCall_DefinedToNSM: Fail, Crash, Timeout
@@ skipping 150 matching lines @@
 dart/spawn_shutdown_test: Skip  # VM Shutdown test
 dart/hello_fuchsia_test: SkipByDesign # This is a test for fuchsia OS
 
 [ ($runtime == vm || $runtime == dart_precompiled) && $mode == debug && $builder_tag == asan ]
 cc/Dart2JSCompileAll: SkipSlow  # Timeout.
 
 [ $builder_tag == asan ]
 cc/CodeImmutability: Fail,OK # Address Sanitizer turns a crash into a failure.
 
 [ $builder_tag == asan && $arch == x64 ]
-cc/EmbeddedScript: Fail # Issue 28345
-
 cc/Log_Basic: Fail # Issue 28347
 cc/Log_Block: Fail # Issue 28347
 cc/Log_Macro: Fail # Issue 28347
 
 cc/Debug_DeleteBreakpoint: Fail # Issue 28348
 
 cc/IsolateReload_ChangeInstanceFormat7: Fail # Issue 28349
 cc/IsolateReload_ClassAdded: Fail # Issue 28349
 cc/IsolateReload_ComplexInheritanceChange: Fail # Issue 28349
 cc/IsolateReload_ConstFieldUpdate: Fail # Issue 28349
@@ skipping 89 matching lines @@
 cc/GuardFieldFinalListTest: Skip
 cc/GuardFieldFinalVariableLengthListTest: Skip
 cc/GuardFieldSimpleTest: Skip
 
 # This test is meaningless for DBC as allocation stubs are not used.
 cc/RegenerateAllocStubs: Skip
 
 [ $hot_reload || $hot_reload_rollback ]
 dart/spawn_shutdown_test: Skip # We can shutdown an isolate before it reloads.
 dart/spawn_infinite_loop_test: Skip # We can shutdown an isolate before it reloads.