Factor DartLibraryProvider out of DartLoader

sky/engine/core/script/dart_library_provider_network.h

Index: sky/engine/core/script/dart_library_provider_network.h
diff --git a/sky/engine/core/script/dart_library_provider_network.h b/sky/engine/core/script/dart_library_provider_network.h
new file mode 100644
index 0000000000000000000000000000000000000000..bc6b7dbad7814d6f688c0ff3c9235df8e94df998
--- /dev/null
+++ b/sky/engine/core/script/dart_library_provider_network.h
@@ -0,0 +1,44 @@
+// 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_ENGINE_CORE_SCRIPT_DART_LIBRARY_PROVIDER_NETWORK_H_
+#define SKY_ENGINE_CORE_SCRIPT_DART_LIBRARY_PROVIDER_NETWORK_H_
+
+#include "sky/engine/tonic/dart_library_provider.h"
+#include "sky/engine/wtf/HashSet.h"
+#include "sky/engine/wtf/OwnPtr.h"
+
+namespace blink {
+
+class DartLibraryProviderNetwork : public DartLibraryProvider {
+ public:
+  struct PrefetchedLibrary {
+    PrefetchedLibrary();
+    ~PrefetchedLibrary();
+
+    String name;
+    mojo::ScopedDataPipeConsumerHandle pipe;
+  };
+
+  explicit DartLibraryProviderNetwork(PassOwnPtr<PrefetchedLibrary> prefetched);
+  ~DartLibraryProviderNetwork() override;
+
+ private:
+  class Job;
+
+  // |DartLibraryProvider| implementation:
+  void GetLibraryAsStream(
+      const String& name,
+      base::Callback<void(mojo::ScopedDataPipeConsumerHandle)> callback)
+      override;
+
+  Dart_Handle CanonicalizeURL(Dart_Handle library, Dart_Handle url) override;
+
+  OwnPtr<PrefetchedLibrary> prefetched_library_;
+  HashSet<OwnPtr<Job>> jobs_;
+};
+
+}  // namespace blink
+
+#endif  // SKY_ENGINE_CORE_SCRIPT_DART_LIBRARY_PROVIDER_NETWORK_H_