Add mojo package manager skeleton.

mojo/tools/package_manager/package_manager_application.h

Index: mojo/tools/package_manager/package_manager_application.h
diff --git a/mojo/tools/package_manager/package_manager_application.h b/mojo/tools/package_manager/package_manager_application.h
new file mode 100644
index 0000000000000000000000000000000000000000..8fa056b71be8cfb11075ff15da91158d0a82254b
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+++ b/mojo/tools/package_manager/package_manager_application.h
@@ -0,0 +1,57 @@
+// Copyright 2014 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 MOJO_PACKAGE_MANAGER_PACKAGE_MANAGER_APPLICATION_H_
+#define MOJO_PACKAGE_MANAGER_PACKAGE_MANAGER_APPLICATION_H_
+
+#include <map>
+
+#include "mojo/public/cpp/application/application_delegate.h"
+#include "mojo/public/cpp/application/interface_factory.h"
+#include "mojo/public/cpp/system/macros.h"
+#include "mojo/services/public/interfaces/network/network_service.mojom.h"
+#include "mojo/tools/package_manager/package_fetcher.h"
+#include "mojo/tools/package_manager/unpacker.h"
+
+namespace mojo {
+
+class PackageManagerApplication
+    : public ApplicationDelegate,
+      public PackageFetcherDelegate {
+ public:
+  PackageManagerApplication();
+  virtual ~PackageManagerApplication();
+
+ private:
+  struct PendingLoad {
+    PendingLoad();
+    ~PendingLoad();
+
+    scoped_ptr<PackageFetcher> fetcher;
+    Unpacker unpacker;
+  };
+  typedef std::map<GURL, PendingLoad*> PendingLoadMap;
+
+  // Deletes the pending load entry for the given URL and possibly exits the
+  // message loop if all loads are done.
+  void PendingLoadComplete(const GURL& url);
+
+  // ApplicationDelegate implementation.
+  virtual void Initialize(ApplicationImpl* app) MOJO_OVERRIDE;
+
+  // PackageFetcher.
+  virtual void FetchSucceeded(const GURL& url,
+                              const base::FilePath& name) override;
+  virtual void FetchFailed(const GURL& url) override;
+
+  mojo::NetworkServicePtr network_service_;
+
+  PendingLoadMap pending_;  // Owning pointers.
+
+  MOJO_DISALLOW_COPY_AND_ASSIGN(PackageManagerApplication);
+};
+
+}  // namespace mojo
+
+#endif  // MOJO_PACKAGE_MANAGER_PACKAGE_MANAGER_APPLICATION_H