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

components/filesystem/file_system_app.cc

 // 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.
 
 #include "components/filesystem/file_system_app.h"
 
+#include <utility>
+
+#include "base/bind.h"
+#include "base/logging.h"
 #include "mojo/shell/public/cpp/connection.h"
 #include "mojo/shell/public/cpp/shell.h"
 
 namespace filesystem {
 
 FileSystemApp::FileSystemApp()
-    : shell_(nullptr), lock_table_(new LockTable) {}
+    : shell_(nullptr), lock_table_(new LockTable), in_shutdown_(false) {}
 
 FileSystemApp::~FileSystemApp() {}
 
 void FileSystemApp::Initialize(mojo::Shell* shell, const std::string& url,
                                uint32_t id) {
   shell_ = shell;
   tracing_.Initialize(shell, url);
 }
 
 bool FileSystemApp::AcceptConnection(mojo::Connection* connection) {
   connection->AddInterface<FileSystem>(this);
   return true;
 }
 
+void FileSystemApp::RegisterDirectoryToClient(DirectoryImpl* directory,
+                                              FileSystemClientPtr client) {
+  directory->set_connection_error_handler(
+      base::Bind(&FileSystemApp::OnDirectoryConnectionError,
+                 base::Unretained(this),
+                 directory));
+  client_mapping_.emplace_back(directory, std::move(client));
+}
+
+bool FileSystemApp::ShellConnectionLost() {
+  if (client_mapping_.empty()) {
+    // If we have no current connections, we can shutdown immediately.
+    return true;
+  }
+
+  in_shutdown_ = true;
+
+  // We have live connections. Send a notification to each one indicating that
+  // they should shutdown.
+  for (std::vector<Client>::iterator it = client_mapping_.begin();
+       it != client_mapping_.end(); ++it) {
+    it->fs_client_->OnFileSystemShutdown();
+  }
+
+  return false;
+}
+
 // |InterfaceFactory<Files>| implementation:
 void FileSystemApp::Create(mojo::Connection* connection,
                            mojo::InterfaceRequest<FileSystem> request) {
-  new FileSystemImpl(connection, std::move(request), lock_table_.get());
+  new FileSystemImpl(this, connection, std::move(request), lock_table_.get());
+}
+
+void FileSystemApp::OnDirectoryConnectionError(DirectoryImpl* directory) {
+  for (std::vector<Client>::iterator it = client_mapping_.begin();
+       it != client_mapping_.end(); ++it) {
+    if (it->directory_ == directory) {
+      client_mapping_.erase(it);
+
+      if (in_shutdown_ && client_mapping_.empty()) {
+        // We just cleared the last directory after our shell connection went
+        // away. Time to shut ourselves down.
+        shell_->Quit();
+      }
+
+      return;
+    }
+  }
+}
+
+FileSystemApp::Client::Client(DirectoryImpl* directory,
+                              FileSystemClientPtr fs_client)
+    : directory_(directory), fs_client_(std::move(fs_client)) {}
+
+FileSystemApp::Client::Client(Client&& rhs)
+    : directory_(rhs.directory_), fs_client_(std::move(rhs.fs_client_)) {}
+
+FileSystemApp::Client::~Client() {}
+
+FileSystemApp::Client& FileSystemApp::Client::operator=(
+    FileSystemApp::Client&& rhs) {
+  directory_ = rhs.directory_;
+  fs_client_ = std::move(rhs.fs_client_);
+  return *this;
 }
 
 }  // namespace filesystem