Upstream session_backend_android.

chrome/browser/sessions/session_backend_android.cc

+// Copyright (c) 2011 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 "chrome/browser/sessions/session_backend.h"
+
+#include "base/stl_util.h"
+#include "net/base/file_stream.h"
+
+// TODO(joth): This is dirty hack to stop SessionBackend from touching the
+// filesystem on Android as tab and session persistence is handled Java side.
+// A better design would be to factor out just those bits of TabRestoreService

[sky, 2012/07/31 15:26:09]

I don't like this hack either. Please refactor appropriately.

[felipeg, 2012/08/01 16:00:58]

I was blindly upstreaming this code, and don't have much of a background on this
issue.
I have a bug tracking this where Joth replied.
http://code.google.com/p/chromium/issues/detail?id=138955

I will drop the change in this file for now, and ping some people to see if
anyone knows how the refactoring should be made.

+// that are required and not instantiate BaseSessionService or SessionBackend
+// at all.
+
+SessionBackend::SessionBackend(BaseSessionService::SessionType type,
+                               const FilePath& path_to_dir)
+    : type_(type),
+      path_to_dir_(path_to_dir) {
+}
+
+void SessionBackend::Init() {
+}
+
+void SessionBackend::AppendCommands(std::vector<SessionCommand*>* commands,
+                                    bool reset_first) {
+  STLDeleteElements(commands);
+  delete commands;
+}
+
+void SessionBackend::ReadLastSessionCommands(
+    scoped_refptr<BaseSessionService::InternalGetCommandsRequest> request) {
+  if (request->canceled())
+    return;
+  Init();
+  ReadLastSessionCommandsImpl(&(request->commands));
+  request->ForwardResult(request->handle(), request);
+}
+
+bool SessionBackend::ReadLastSessionCommandsImpl(
+    std::vector<SessionCommand*>* commands) {
+  commands->clear();
+  return false;
+}
+
+void SessionBackend::DeleteLastSession() {
+}
+
+void SessionBackend::MoveCurrentSessionToLastSession() {
+}
+
+void SessionBackend::ReadCurrentSessionCommands(
+    scoped_refptr<BaseSessionService::InternalGetCommandsRequest> request) {
+  if (request->canceled())
+    return;
+  Init();
+  ReadCurrentSessionCommandsImpl(&(request->commands));
+  request->ForwardResult(request->handle(), request);
+}
+
+bool SessionBackend::ReadCurrentSessionCommandsImpl(
+    std::vector<SessionCommand*>* commands) {
+  commands->clear();
+  return false;
+}
+
+SessionBackend::~SessionBackend() {
+}