Mojo: Use network service to load non-local Mojo Apps.

mojo/shell/mojo_url_resolver.h

Index: mojo/shell/mojo_url_resolver.h
diff --git a/mojo/shell/mojo_url_resolver.h b/mojo/shell/mojo_url_resolver.h
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+// 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_SHELL_MOJO_URL_RESOLVER_H_
+#define MOJO_SHELL_MOJO_URL_RESOLVER_H_
+
+#include <map>
+#include <set>
+
+#include "url/gurl.h"
+
+namespace mojo {
+namespace shell {
+
+// This class resolves "mojo:" URLs to physical URLs (e.g., "file:" and
+// "https:" URLs). By default, "mojo:" URLs resolve to a file location, but
+// that resolution can be customized via the AddCustomMapping method.
+class MojoURLResolver {
+ public:
+  MojoURLResolver();
+  ~MojoURLResolver();
+
+  // If specified, then unknown "mojo:" URLs will be resolved relative to this
+  // origin. That is, the portion after the colon will be appeneded to origin
+  // with platform-specific shared library prefix and suffix inserted.
+  void set_origin(const std::string& origin) { origin_ = origin; }
+
+  // Add a custom mapping for a particular "mojo:" URL.
+  void AddCustomMapping(const GURL& mojo_url, const GURL& resolved_url);
+
+  // Add a local file mapping for a particular "mojo:" URL. This causes the
+  // "mojo:" URL to be resolved to an base::DIR_EXE-relative shared library.
+  void AddLocalFileMapping(const GURL& mojo_url);
+
+  // Resolve the given "mojo:" URL to the URL that should be used to fetch the
+  // code for the corresponding Mojo App.
+  GURL Resolve(const GURL& mojo_url) const;
+
+ private:
+  std::map<GURL, GURL> url_map_;
+  std::set<GURL> local_file_set_;
+  std::string origin_;
+};
+
+}  // namespace shell
+}  // namespace mojo
+
+#endif  // MOJO_SHELL_MOJO_URL_RESOLVER_H_