Make it possible to run Sky apps offline

sky/viewer/dart_library_provider_impl.h

Index: sky/viewer/dart_library_provider_impl.h
diff --git a/sky/viewer/dart_library_provider_impl.h b/sky/viewer/dart_library_provider_impl.h
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+++ b/sky/viewer/dart_library_provider_impl.h
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+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef SKY_VIEWER_DART_LIBRARY_PROVIDER_IMPL_H_
+#define SKY_VIEWER_DART_LIBRARY_PROVIDER_IMPL_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "sky/shell/dart/dart_library_provider_network.h"
+
+namespace sky {
+
+class DartLibraryProviderImpl : public shell::DartLibraryProviderNetwork {
+ public:
+  struct PrefetchedLibrary {
+    PrefetchedLibrary();
+    ~PrefetchedLibrary();
+
+    String name;
+    mojo::ScopedDataPipeConsumerHandle pipe;
+  };
+
+  explicit DartLibraryProviderImpl(mojo::NetworkService* network_service,
+                                   scoped_ptr<PrefetchedLibrary> prefetched);
+  ~DartLibraryProviderImpl() override;
+
+ private:
+  void GetLibraryAsStream(const String& name,
+                          blink::DataPipeConsumerCallback callback) override;
+
+  scoped_ptr<PrefetchedLibrary> prefetched_library_;
+
+  DISALLOW_COPY_AND_ASSIGN(DartLibraryProviderImpl);
+};
+
+}  // namespace sky
+
+#endif  // SKY_VIEWER_DART_LIBRARY_PROVIDER_IMPL_H_