Use locker when creating snapshot if necessary.

test/cctest/test-serialize.cc

Index: test/cctest/test-serialize.cc
diff --git a/test/cctest/test-serialize.cc b/test/cctest/test-serialize.cc
index 592a9ff1192c35ff0d6cc186619b6e9868e7fc06..3a2d6f26d97db3356a207bf98db69a20b072696d 100644
--- a/test/cctest/test-serialize.cc
+++ b/test/cctest/test-serialize.cc
@@ -748,6 +748,42 @@ TEST(PerIsolateSnapshotBlobs) {
 }
 
 
+TEST(PerIsolateSnapshotBlobsWithLocker) {
+  // Disable experimental natives that are loaded after deserialization.
+  FLAG_harmony_shipping = false;
+  FlagList::EnforceFlagImplications();
+
+  v8::Isolate* isolate0 = v8::Isolate::New();
+  {
+    v8::Locker locker(isolate0);
+    v8::Isolate::Scope i_scope(isolate0);
+    v8::HandleScope h_scope(isolate0);
+    v8::Local<v8::Context> context = v8::Context::New(isolate0);
+    v8::Context::Scope c_scope(context);
+    CHECK_EQ(1, CompileRun("Math.cos(0)")->ToInt32(isolate0)->Int32Value());
+  }
+  isolate0->Dispose();
+
+  const char* source1 = "function f() { return 42; }";
+
+  v8::StartupData data1 = v8::V8::CreateSnapshotDataBlob(source1);
+
+  v8::Isolate::CreateParams params1;
+  params1.snapshot_blob = &data1;
+  v8::Isolate* isolate1 = v8::Isolate::New(params1);
+  {
+    v8::Locker locker(isolate1);
+    v8::Isolate::Scope i_scope(isolate1);
+    v8::HandleScope h_scope(isolate1);
+    v8::Local<v8::Context> context = v8::Context::New(isolate1);
+    delete[] data1.data;  // We can dispose of the snapshot blob now.
+    v8::Context::Scope c_scope(context);
+    CHECK_EQ(42, CompileRun("f()")->ToInt32(isolate1)->Int32Value());
+  }
+  isolate1->Dispose();
+}
+
+
 TEST(TestThatAlwaysSucceeds) {
 }