Revert of mojo: Get mojo:leveldb and mojo:filesystem compiled into content.

components/filesystem/file_system_app.h

 // 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 COMPONENTS_FILESYSTEM_FILE_SYSTEM_APP_H_
 #define COMPONENTS_FILESYSTEM_FILE_SYSTEM_APP_H_
 
 #include "base/macros.h"
 #include "components/filesystem/directory_impl.h"
 #include "components/filesystem/file_system_impl.h"
 #include "components/filesystem/lock_table.h"
 #include "components/filesystem/public/interfaces/file_system.mojom.h"
 #include "mojo/services/tracing/public/cpp/tracing_impl.h"
 #include "mojo/shell/public/cpp/interface_factory.h"
 #include "mojo/shell/public/cpp/shell_client.h"
 
 namespace mojo {
 class Shell;
 }
 
 namespace filesystem {
 
 class FileSystemApp : public mojo::ShellClient,
                       public mojo::InterfaceFactory<FileSystem> {
  public:
   FileSystemApp();
   ~FileSystemApp() override;
 
+  // Called by individual FileSystem objects to register lifetime events.
+  void RegisterDirectoryToClient(DirectoryImpl* directory,
+                                 FileSystemClientPtr client);
+
  private:
+  // We set the DirectoryImpl's error handler to this function. We do this so
+  // that we can QuitNow() once the last DirectoryImpl has closed itself.
+  void OnDirectoryConnectionError(DirectoryImpl* directory);
+
   // |mojo::ShellClient| override:
   void Initialize(mojo::Shell* shell, const std::string& url,
                   uint32_t id) override;
   bool AcceptConnection(mojo::Connection* connection) override;
+  bool ShellConnectionLost() override;
 
   // |InterfaceFactory<Files>| implementation:
   void Create(mojo::Connection* connection,
               mojo::InterfaceRequest<FileSystem> request) override;
 
+  // Use a vector to work around map not letting us use FileSystemClientPtr as
+  // a value in a std::map. The move constructors are to allow us to deal with
+  // FileSystemClientPtr inside a vector.
+  struct Client {
+    Client(DirectoryImpl* directory, FileSystemClientPtr fs_client);
+    Client(Client&& rhs);
+    ~Client();
+
+    Client& operator=(Client&& rhs);
+
+    DirectoryImpl* directory_;
+    FileSystemClientPtr fs_client_;
+  };
+  std::vector<Client> client_mapping_;
+
   mojo::Shell* shell_;
   mojo::TracingImpl tracing_;
 
   scoped_ptr<LockTable> lock_table_;
 
+  // Set to true when our shell connection is closed. On connection error, we
+  // then broadcast a notification to all FileSystemClients that they should
+  // shut down. Once the final one does, then we QuitNow().
+  bool in_shutdown_;
+
   DISALLOW_COPY_AND_ASSIGN(FileSystemApp);
 };
 
 }  // namespace filesystem
 
 #endif  // COMPONENTS_FILESYSTEM_FILE_SYSTEM_APP_H_