Refactor install.cc into the work item parts and the non-work item parts.

chrome/installer/setup/install_worker.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.
+//
+// This file contains the definitions of the installer functions that build
+// the WorkItemList used to install the application.
+
+#include "chrome/installer/setup/install_worker.h"
+
+#include <shlobj.h>
+#include <time.h>
+#include <vector>
+
+#include "base/command_line.h"
+#include "base/file_path.h"
+#include "base/logging.h"
+#include "base/path_service.h"
+#include "base/string_util.h"
+#include "base/utf_string_conversions.h"
+#include "base/version.h"
+#include "base/win/registry.h"
+#include "chrome/installer/setup/install.h"
+#include "chrome/installer/setup/setup_constants.h"
+#include "chrome/installer/util/chrome_frame_distribution.h"
+#include "chrome/installer/util/conditional_work_item_list.h"
+#include "chrome/installer/util/create_reg_key_work_item.h"
+#include "chrome/installer/util/google_update_constants.h"
+#include "chrome/installer/util/helper.h"
+#include "chrome/installer/util/installation_state.h"
+#include "chrome/installer/util/installer_state.h"
+#include "chrome/installer/util/install_util.h"
+#include "chrome/installer/util/master_preferences.h"
+#include "chrome/installer/util/master_preferences_constants.h"
+#include "chrome/installer/util/package.h"
+#include "chrome/installer/util/package_properties.h"
+#include "chrome/installer/util/product.h"
+#include "chrome/installer/util/set_reg_value_work_item.h"
+#include "chrome/installer/util/shell_util.h"
+#include "chrome/installer/util/util_constants.h"
+#include "chrome/installer/util/work_item_list.h"
+
+using base::win::RegKey;
+
+namespace {
+
+// This method tells if we are running on 64 bit platform so that we can copy
+// one extra exe. If the API call to determine 64 bit fails, we play it safe
+// and return true anyway so that the executable can be copied.
+bool Is64bit() {
+  typedef BOOL (WINAPI *WOW_FUNC)(HANDLE, PBOOL);

[tommi (sloooow) - chröme, 2011/01/12 19:02:49]

BOOL* instead of PBOOL.

[robertshield, 2011/01/13 17:06:32]

Done.

+  BOOL is64 = FALSE;

[amit, 2011/01/12 17:41:22]

nit: is_64bit :)

[robertshield, 2011/01/13 17:06:32]

Done.

+
+  HANDLE handle = GetCurrentProcess();

[tommi (sloooow) - chröme, 2011/01/12 19:02:49]

'handle' is less descriptive than just calling GetCurrentProcess() where you
need it.

[robertshield, 2011/01/13 17:06:32]

Done.  (In case it wasn't clear, this code is copy/pasted from its original
location).

+  HMODULE module = GetModuleHandle(L"kernel32.dll");
+  WOW_FUNC p = reinterpret_cast<WOW_FUNC>(GetProcAddress(module,

[tommi (sloooow) - chröme, 2011/01/12 19:02:49]

nit: is_wow_64 instead of p

[robertshield, 2011/01/13 17:06:32]

Done.

+                                                         "IsWow64Process"));
+  if ((p != NULL) && (!(p)(handle, &is64) || (is64 != FALSE))) {

[tommi (sloooow) - chröme, 2011/01/12 19:02:49]

You don't really need the if and two return statements.  could just be:

return is_wow_64 != NULL && (!is_wow_64(GetCurrentProcess(), &is64) || is64);

[robertshield, 2011/01/13 17:06:32]

Done.

+    return true;
+  }
+
+  return false;
+}
+
+}  // namespace
+
+namespace installer {
+

[erikwright (departed), 2011/01/12 16:31:49]

I assume these are identical to the originals?

[tommi (sloooow) - chröme, 2011/01/12 19:02:49]

+1 (to save on review time)

[robertshield, 2011/01/13 17:06:32]

Yes, copy/pasted.

[robertshield, 2011/01/13 17:06:32]

Done.

+// Local helper to call AddRegisterComDllWorkItems for all DLLs in a set of
+// products managed by a given package.
+void AddRegisterComDllWorkItemsForPackage(const Package& package,
+                                          const Version* old_version,
+                                          const Version& new_version,
+                                          WorkItemList* work_item_list) {
+  // First collect the list of DLLs to be registered from each product.
+  const Products& products = package.products();
+  Products::const_iterator product_iter(products.begin());
+  std::vector<FilePath> com_dll_list;
+  for (; product_iter != products.end(); ++product_iter) {
+    BrowserDistribution* dist = product_iter->get()->distribution();
+    std::vector<FilePath> dist_dll_list(dist->GetComDllList());
+    com_dll_list.insert(com_dll_list.end(), dist_dll_list.begin(),
+                        dist_dll_list.end());
+  }
+
+  // Then, if we got some, attempt to unregister the DLLs from the old
+  // version directory and then re-register them in the new one.
+  // Note that if we are migrating the install directory then we will not
+  // successfully unregister the old DLLs.
+  // TODO(robertshield): See whether we need to fix the migration case.
+  // TODO(robertshield): If we ever remove a DLL from a product, this will
+  // not unregister it on update. We should build the unregistration list from
+  // saved state instead of assuming it is the same as the registration list.
+  if (!com_dll_list.empty()) {
+    if (old_version) {
+      FilePath old_dll_path(
+          package.path().Append(UTF8ToWide(old_version->GetString())));
+
+      installer::AddRegisterComDllWorkItems(old_dll_path,
+                                            com_dll_list,
+                                            package.system_level(),
+                                            false,  // Unregister
+                                            true,   // May fail
+                                            work_item_list);
+    }
+
+    FilePath dll_path(
+        package.path().Append(UTF8ToWide(new_version.GetString())));
+    installer::AddRegisterComDllWorkItems(dll_path,
+                                          com_dll_list,
+                                          package.system_level(),
+                                          true,   // Register
+                                          false,  // Must succeed.
+                                          work_item_list);
+  }
+}
+
+void AddInstallerCopyTasks(const FilePath& setup_path,
+                           const FilePath& archive_path,
+                           const FilePath& temp_path,
+                           const Version& new_version,
+                           WorkItemList* install_list,
+                           const Package& package) {
+  DCHECK(install_list);
+  FilePath installer_dir(package.GetInstallerDirectory(new_version));
+  install_list->AddCreateDirWorkItem(installer_dir);
+
+  FilePath exe_dst(installer_dir.Append(setup_path.BaseName()));
+  FilePath archive_dst(installer_dir.Append(archive_path.BaseName()));
+
+  install_list->AddCopyTreeWorkItem(setup_path.value(), exe_dst.value(),
+                                    temp_path.value(), WorkItem::ALWAYS);
+  if (package.system_level()) {
+    install_list->AddCopyTreeWorkItem(archive_path.value(), archive_dst.value(),
+                                      temp_path.value(), WorkItem::ALWAYS);
+  } else {
+    install_list->AddMoveTreeWorkItem(archive_path.value(), archive_dst.value(),
+                                      temp_path.value());
+  }
+}
+
+// This method adds work items to create (or update) Chrome uninstall entry in
+// either the Control Panel->Add/Remove Programs list or in the Omaha client
+// state key if running under an MSI installer.
+void AddUninstallShortcutWorkItems(const FilePath& setup_path,
+                                   const Version& new_version,
+                                   WorkItemList* install_list,
+                                   const Product& product) {
+  HKEY reg_root = product.system_level() ? HKEY_LOCAL_MACHINE :
+                                           HKEY_CURRENT_USER;
+  BrowserDistribution* browser_dist = product.distribution();
+  DCHECK(browser_dist);
+
+  // When we are installed via an MSI, we need to store our uninstall strings
+  // in the Google Update client state key. We do this even for non-MSI
+  // managed installs to avoid breaking the edge case whereby an MSI-managed
+  // install is updated by a non-msi installer (which would confuse the MSI
+  // machinery if these strings were not also updated).
+  // Do not quote the command line for the MSI invocation.
+  FilePath install_path(product.package().path());
+  FilePath installer_path(
+      product.package().GetInstallerDirectory(new_version));
+  installer_path = installer_path.Append(setup_path.BaseName());
+
+  CommandLine uninstall_arguments(CommandLine::NO_PROGRAM);
+  AppendUninstallCommandLineFlags(&uninstall_arguments, product);
+
+  if (product.is_chrome()) {
+    // The Chrome uninstallation command serves as the master uninstall
+    // command for Chrome + all other products (i.e. Chrome Frame) that do
+    // not have an uninstall entry in the Add/Remove Programs dialog.
+    const Products& products = product.package().products();
+    for (size_t i = 0; i < products.size(); ++i) {
+      const Product& p = *products[i];
+      if (!p.is_chrome() && !p.ShouldCreateUninstallEntry()) {
+        p.distribution()->AppendUninstallCommandLineFlags(&uninstall_arguments);
+      }
+    }
+  }
+
+  std::wstring update_state_key(browser_dist->GetStateKey());
+  install_list->AddCreateRegKeyWorkItem(reg_root, update_state_key);
+  install_list->AddSetRegValueWorkItem(reg_root, update_state_key,
+      installer::kUninstallStringField, installer_path.value(), true);
+  install_list->AddSetRegValueWorkItem(reg_root, update_state_key,
+      installer::kUninstallArgumentsField,
+      uninstall_arguments.command_line_string(), true);
+
+  if (product.ShouldCreateUninstallEntry()) {
+    // We need to quote the command line for the Add/Remove Programs dialog.
+    CommandLine quoted_uninstall_cmd(installer_path);
+    DCHECK_EQ(quoted_uninstall_cmd.command_line_string()[0], '"');
+    quoted_uninstall_cmd.AppendArguments(uninstall_arguments, false);
+
+    std::wstring uninstall_reg = browser_dist->GetUninstallRegPath();
+    install_list->AddCreateRegKeyWorkItem(reg_root, uninstall_reg);
+    install_list->AddSetRegValueWorkItem(reg_root, uninstall_reg,
+        installer::kUninstallDisplayNameField,
+        browser_dist->GetAppShortCutName(), true);
+    install_list->AddSetRegValueWorkItem(reg_root,
+        uninstall_reg, installer::kUninstallStringField,
+        quoted_uninstall_cmd.command_line_string(), true);
+    install_list->AddSetRegValueWorkItem(reg_root,
+                                         uninstall_reg,
+                                         L"InstallLocation",
+                                         install_path.value(),
+                                         true);
+
+    // DisplayIcon, NoModify and NoRepair
+    FilePath chrome_icon(install_path.Append(installer::kChromeExe));
+    ShellUtil::GetChromeIcon(product.distribution(), chrome_icon.value());
+    install_list->AddSetRegValueWorkItem(reg_root, uninstall_reg,

[tommi (sloooow) - chröme, 2011/01/12 19:02:49]

observation - we should factor out all these factory methods to a special
interface that can then be replaced in a unit test.

[robertshield, 2011/01/13 17:06:32]

I'm mocking the WorkItemList at the moment which accomplishes what you describe
here.

+                                         L"DisplayIcon", chrome_icon.value(),
+                                         true);
+    install_list->AddSetRegValueWorkItem(reg_root, uninstall_reg,
+                                         L"NoModify", 1, true);
+    install_list->AddSetRegValueWorkItem(reg_root, uninstall_reg,
+                                         L"NoRepair", 1, true);
+
+    install_list->AddSetRegValueWorkItem(reg_root, uninstall_reg,
+                                         L"Publisher",
+                                         browser_dist->GetPublisherName(),
+                                         true);
+    install_list->AddSetRegValueWorkItem(reg_root, uninstall_reg,
+                                         L"Version",
+                                         UTF8ToWide(new_version.GetString()),
+                                         true);
+    install_list->AddSetRegValueWorkItem(reg_root, uninstall_reg,
+                                         L"DisplayVersion",
+                                         UTF8ToWide(new_version.GetString()),
+                                         true);
+    time_t rawtime = time(NULL);
+    struct tm timeinfo = {0};
+    localtime_s(&timeinfo, &rawtime);
+    wchar_t buffer[9];
+    if (wcsftime(buffer, 9, L"%Y%m%d", &timeinfo) == 8) {
+      install_list->AddSetRegValueWorkItem(reg_root, uninstall_reg,
+                                           L"InstallDate",
+                                           buffer, false);
+    }
+  }
+}
+
+

[tommi (sloooow) - chröme, 2011/01/12 19:02:49]

one empty line

[robertshield, 2011/01/13 17:06:32]

Done.

+
+// Create Version key for a product (if not already present) and sets the new
+// product version as the last step.
+void AddVersionKeyWorkItems(HKEY root,
+                            const Product& product,
+                            const Version& new_version,
+                            WorkItemList* list) {
+  // Create Version key for each distribution (if not already present) and set
+  // the new product version as the last step.
+  std::wstring version_key(product.distribution()->GetVersionKey());
+  list->AddCreateRegKeyWorkItem(root, version_key);
+
+  std::wstring product_name(product.distribution()->GetAppShortCutName());
+  list->AddSetRegValueWorkItem(root, version_key, google_update::kRegNameField,
+                               product_name, true);  // overwrite name also
+  list->AddSetRegValueWorkItem(root, version_key,
+                               google_update::kRegOopcrashesField, 1,
+                               false);  // set during first install
+  list->AddSetRegValueWorkItem(root, version_key,
+                               google_update::kRegVersionField,
+                               UTF8ToWide(new_version.GetString()),
+                               true);  // overwrite version
+}
+
+void AddProductSpecificWorkItems(bool install,
+                                 const FilePath& setup_path,
+                                 const Version& new_version,
+                                 const Package& package,
+                                 WorkItemList* list) {
+  const Products& products = package.products();
+  for (size_t i = 0; i < products.size(); ++i) {
+    const Product& p = *products[i];
+    if (p.is_chrome_frame()) {
+      AddChromeFrameWorkItems(install, setup_path, new_version, p, list);
+    }
+  }
+}
+

[tommi (sloooow) - chröme, 2011/01/12 19:02:49]

one empty line

[robertshield, 2011/01/13 17:06:32]

Done.

+
+// Adds work items that make registry adjustments for Google Update.  When a
+// product is installed (including overinstall), Google Update will write the
+// channel ("ap") value into either Chrome or Chrome Frame's ClientState key.
+// In the multi-install case, this value is used as the basis upon which the
+// package's channel value is built (by adding the ordered list of installed
+// products and their options).
+void AddGoogleUpdateWorkItems(const InstallationState& original_state,
+                              const InstallerState& installer_state,
+                              const Package& package,
+                              WorkItemList* install_list) {
+  // Is a multi-install product being installed or over-installed?
+  if (installer_state.operation() != InstallerState::MULTI_INSTALL)
+    return;
+
+  const HKEY reg_root = package.system_level() ? HKEY_LOCAL_MACHINE :
+                                                 HKEY_CURRENT_USER;
+  const std::wstring key_path = installer_state.state_key();
+  ChannelInfo channel_info;
+
+  // Update the "ap" value for the product being installed/updated.
+  // It is completely acceptable for there to be no "ap" value or even no
+  // ClientState key.  Note that we check the registry rather than
+  // original_state since on a fresh install the "ap" value will be present
+  // sans "pv" value.
+  channel_info.Initialize(RegKey(reg_root, key_path.c_str(), KEY_QUERY_VALUE));
+
+  // This is a multi-install product.
+  bool modified = channel_info.SetMultiInstall(true);
+
+  // Add the appropriate modifiers for all products and their options.
+  Products::const_iterator scan = package.products().begin();
+  const Products::const_iterator end = package.products().end();
+  for (; scan != end; ++scan) {
+    modified |= scan->get()->distribution()->SetChannelFlags(true,
+                                                             &channel_info);
+  }
+
+  // Write the results if needed.
+  if (modified) {
+    install_list->AddSetRegValueWorkItem(reg_root, key_path,
+                                         google_update::kRegApField,
+                                         channel_info.value(), true);
+  }
+
+  // Synchronize the other products and the package with this one.
+  std::wstring other_key;
+  std::vector<std::wstring> keys;
+
+  keys.reserve(package.products().size());
+  other_key = package.properties()->GetStateKey();
+  if (other_key != key_path)
+    keys.push_back(other_key);
+  scan = package.products().begin();
+  for (; scan != end; ++scan) {
+    other_key = scan->get()->distribution()->GetStateKey();
+    if (other_key != key_path)
+      keys.push_back(other_key);
+  }
+
+  RegKey key;
+  ChannelInfo other_info;
+  std::vector<std::wstring>::const_iterator kscan = keys.begin();
+  std::vector<std::wstring>::const_iterator kend = keys.end();
+  for (; kscan != kend; ++kscan) {
+    // Handle the case where the ClientState key doesn't exist by creating it.
+    // This takes care of the multi-installer's package key, which is not
+    // created by Google Update for us.
+    if (!key.Open(reg_root, kscan->c_str(), KEY_QUERY_VALUE) ||
+        !other_info.Initialize(key)) {
+      other_info.set_value(std::wstring());
+    }
+    if (!other_info.Equals(channel_info)) {
+      if (!key.Valid())
+        install_list->AddCreateRegKeyWorkItem(reg_root, *kscan);
+      install_list->AddSetRegValueWorkItem(reg_root, *kscan,
+                                           google_update::kRegApField,
+                                           channel_info.value(), true);
+    }
+  }
+  // TODO(grt): check for other keys/values we should put in the package's
+  // ClientState and/or Clients key.
+}
+
+// This is called when an MSI installation is run. It may be that a user is
+// attempting to install the MSI on top of a non-MSI managed installation.
+// If so, try and remove any existing uninstallation shortcuts, as we want the
+// uninstall to be managed entirely by the MSI machinery (accessible via the
+// Add/Remove programs dialog).
+void AddDeleteUninstallShortcutsForMSIWorkItems(const Product& product,
+                                                WorkItemList* work_item_list) {
+  DCHECK(product.IsMsi()) << "This must only be called for MSI installations!";
+
+  // First attempt to delete the old installation's ARP dialog entry.
+  HKEY reg_root = product.system_level() ? HKEY_LOCAL_MACHINE :
+                                           HKEY_CURRENT_USER;
+  base::win::RegKey root_key(reg_root, L"", KEY_ALL_ACCESS);
+  std::wstring uninstall_reg(product.distribution()->GetUninstallRegPath());
+
+  WorkItem* delete_reg_key = work_item_list->AddDeleteRegKeyWorkItem(
+      reg_root, uninstall_reg);
+  delete_reg_key->set_ignore_failure(true);
+
+  // Then attempt to delete the old installation's start menu shortcut.
+  FilePath uninstall_link;
+  if (product.system_level()) {
+    PathService::Get(base::DIR_COMMON_START_MENU, &uninstall_link);
+  } else {
+    PathService::Get(base::DIR_START_MENU, &uninstall_link);
+  }
+
+  if (uninstall_link.empty()) {
+    LOG(ERROR) << "Failed to get location for shortcut.";
+  } else {
+    uninstall_link = uninstall_link.Append(
+        product.distribution()->GetAppShortCutName());
+    uninstall_link = uninstall_link.Append(
+        product.distribution()->GetUninstallLinkName() + L".lnk");
+    VLOG(1) << "Deleting old uninstall shortcut (if present): "
+            << uninstall_link.value();
+    WorkItem* delete_link = work_item_list->AddDeleteTreeWorkItem(
+        uninstall_link);
+    delete_link->set_ignore_failure(true);
+    delete_link->set_log_message(
+        "Failed to delete old uninstall shortcut.");
+  }
+}
+

[tommi (sloooow) - chröme, 2011/01/12 19:02:49]

one empty line (and throughout)

[robertshield, 2011/01/13 17:06:32]

Done.

+
+// After a successful copying of all the files, this function is called to
+// do a few post install tasks:
+// - Handle the case of in-use-update by updating "opv" (old version) key or
+//   deleting it if not required.
+// - Register any new dlls and unregister old dlls.
+// - If this is an MSI install, ensures that the MSI marker is set, and sets
+//   it if not.
+// If these operations are successful, the function returns true, otherwise
+// false.
+bool AppendPostInstallTasks(bool multi_install,
+                            const FilePath& setup_path,
+                            const FilePath& new_chrome_exe,
+                            const Version* current_version,
+                            const Version& new_version,
+                            const Package& package,
+                            WorkItemList* post_install_task_list) {
+  DCHECK(post_install_task_list);
+  HKEY root = package.system_level() ? HKEY_LOCAL_MACHINE :
+                                       HKEY_CURRENT_USER;
+  const Products& products = package.products();
+

[tommi (sloooow) - chröme, 2011/01/12 19:02:49]

here too :)

[robertshield, 2011/01/13 17:06:32]

Done.

+
+  // Append work items that will only be executed if this was an update.
+  // We update the 'opv' key with the current version that is active and 'cmd'
+  // key with the rename command to run.
+  {
+    scoped_ptr<WorkItemList> in_use_update_work_items(
+        WorkItem::CreateConditionalWorkItemList(
+            new ConditionRunIfFileExists(new_chrome_exe)));
+    in_use_update_work_items->set_log_message("InUseUpdateWorkItemList");
+
+    FilePath installer_path(package.GetInstallerDirectory(new_version)
+        .Append(setup_path.BaseName()));
+
+    CommandLine rename(installer_path);
+    rename.AppendSwitch(installer::switches::kRenameChromeExe);
+    if (package.system_level())
+      rename.AppendSwitch(installer::switches::kSystemLevel);
+
+    if (InstallUtil::IsChromeSxSProcess())
+      rename.AppendSwitch(installer::switches::kChromeSxS);
+
+    if (multi_install)
+      rename.AppendSwitch(installer::switches::kMultiInstall);
+
+    std::wstring version_key;
+    for (size_t i = 0; i < products.size(); ++i) {
+      BrowserDistribution* dist = products[i]->distribution();
+      version_key = dist->GetVersionKey();
+
+      if (current_version != NULL) {
+        in_use_update_work_items->AddSetRegValueWorkItem(root, version_key,
+            google_update::kRegOldVersionField,
+            UTF8ToWide(current_version->GetString()), true);
+      }
+
+      // Adding this registry entry for all products is overkill.
+      // However, as it stands, we don't have a way to know which distribution
+      // will check the key and run the command, so we add it for all.
+      // After the first run, the subsequent runs should just be noops.
+      // (see Upgrade::SwapNewChromeExeIfPresent).
+      in_use_update_work_items->AddSetRegValueWorkItem(
+          root,
+          version_key,
+          google_update::kRegRenameCmdField,
+          rename.command_line_string(),
+          true);
+    }
+
+    if (multi_install) {
+      PackageProperties* props = package.properties();
+      if (props->ReceivesUpdates() && current_version != NULL) {
+        in_use_update_work_items->AddSetRegValueWorkItem(
+            root,
+            props->GetVersionKey(),
+            google_update::kRegOldVersionField,
+            UTF8ToWide(current_version->GetString()),
+            true);
+        // TODO(tommi): We should move the rename command here. We also need to
+        // update Upgrade::SwapNewChromeExeIfPresent.
+      }
+    }
+
+    post_install_task_list->AddWorkItem(in_use_update_work_items.release());
+  }
+
+
+  // Append work items that will be executed if this was NOT an in-use update.
+  {
+    scoped_ptr<WorkItemList> regular_update_work_items(
+        WorkItem::CreateConditionalWorkItemList(
+            new Not(new ConditionRunIfFileExists(new_chrome_exe))));
+    regular_update_work_items->set_log_message(
+        "RegularUpdateWorkItemList");
+
+    // Since this was not an in-use-update, delete 'opv' and 'cmd' keys.
+    for (size_t i = 0; i < products.size(); ++i) {
+      BrowserDistribution* dist = products[i]->distribution();
+      std::wstring version_key(dist->GetVersionKey());
+      regular_update_work_items->AddDeleteRegValueWorkItem(root, version_key,
+                                            google_update::kRegOldVersionField,
+                                            true);
+      regular_update_work_items->AddDeleteRegValueWorkItem(root, version_key,
+                                            google_update::kRegRenameCmdField,
+                                            true);
+    }
+
+    post_install_task_list->AddWorkItem(regular_update_work_items.release());
+  }
+
+  AddRegisterComDllWorkItemsForPackage(package, current_version, new_version,
+                                       post_install_task_list);
+
+  for (size_t i = 0; i < products.size(); ++i) {
+    const Product* product = products[i];
+    // If we're told that we're an MSI install, make sure to set the marker
+    // in the client state key so that future updates do the right thing.
+    if (product->IsMsi()) {
+      AddSetMsiMarkerWorkItem(*product, true, post_install_task_list);
+
+      // We want MSI installs to take over the Add/Remove Programs shortcut.
+      // Make a best-effort attempt to delete any shortcuts left over from
+      // previous non-MSI installations for the same type of install (system or
+      // per user).
+      AddDeleteUninstallShortcutsForMSIWorkItems(*product,
+                                                 post_install_task_list);
+    }
+  }
+
+  return true;
+}
+
+void AddInstallWorkItems(const InstallationState& original_state,
+                         const InstallerState& installer_state,
+                         bool multi_install,
+                         const FilePath& setup_path,
+                         const FilePath& archive_path,
+                         const FilePath& src_path,
+                         const FilePath& temp_dir,
+                         const Version& new_version,
+                         scoped_ptr<Version>* current_version,
+                         const Package& package,
+                         WorkItemList* install_list) {
+  DCHECK(install_list);
+
+  // A temp directory that work items need and the actual install directory.
+  install_list->AddCreateDirWorkItem(temp_dir);
+  install_list->AddCreateDirWorkItem(package.path());
+
+  // Delete any new_chrome.exe if present (we will end up creating a new one
+  // if required) and then copy chrome.exe
+  FilePath new_chrome_exe(
+      package.path().Append(installer::kChromeNewExe));
+
+  install_list->AddDeleteTreeWorkItem(new_chrome_exe);
+  install_list->AddCopyTreeWorkItem(
+      src_path.Append(installer::kChromeExe).value(),
+      package.path().Append(installer::kChromeExe).value(),
+      temp_dir.value(), WorkItem::NEW_NAME_IF_IN_USE, new_chrome_exe.value());
+
+  // Extra executable for 64 bit systems.
+  if (Is64bit()) {
+    install_list->AddCopyTreeWorkItem(
+        src_path.Append(installer::kWowHelperExe).value(),
+        package.path().Append(installer::kWowHelperExe).value(),
+        temp_dir.value(), WorkItem::ALWAYS);
+  }
+
+  // If it is system level install copy the version folder (since we want to
+  // take the permissions of %ProgramFiles% folder) otherwise just move it.
+  if (package.system_level()) {
+    install_list->AddCopyTreeWorkItem(
+        src_path.Append(UTF8ToWide(new_version.GetString())).value(),
+        package.path().Append(UTF8ToWide(new_version.GetString())).value(),
+        temp_dir.value(), WorkItem::ALWAYS);
+  } else {
+    install_list->AddMoveTreeWorkItem(
+        src_path.Append(UTF8ToWide(new_version.GetString())).value(),
+        package.path().Append(UTF8ToWide(new_version.GetString())).value(),
+        temp_dir.value());
+  }
+
+  // Copy the default Dictionaries only if the folder doesn't exist already.
+  install_list->AddCopyTreeWorkItem(
+      src_path.Append(installer::kDictionaries).value(),
+      package.path().Append(installer::kDictionaries).value(),
+      temp_dir.value(), WorkItem::IF_NOT_PRESENT);
+
+  // Delete any old_chrome.exe if present.
+  install_list->AddDeleteTreeWorkItem(
+      package.path().Append(installer::kChromeOldExe));
+
+  // Copy installer in install directory and
+  // add shortcut in Control Panel->Add/Remove Programs.
+  AddInstallerCopyTasks(setup_path, archive_path, temp_dir, new_version,
+                        install_list, package);
+
+  HKEY root = package.system_level() ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
+
+  const Products& products = package.products();
+  for (size_t i = 0; i < products.size(); ++i) {
+    const Product* product = products[i];
+
+    AddUninstallShortcutWorkItems(setup_path, new_version, install_list,
+                                  *product);
+
+    AddVersionKeyWorkItems(root, *product, new_version, install_list);
+  }
+
+  if (multi_install) {
+    PackageProperties* props = package.properties();
+    if (props->ReceivesUpdates()) {
+      std::wstring version_key(props->GetVersionKey());
+      install_list->AddCreateRegKeyWorkItem(root, version_key);
+      install_list->AddSetRegValueWorkItem(root, version_key,
+                                           google_update::kRegVersionField,
+                                           UTF8ToWide(new_version.GetString()),
+                                           true);    // overwrite version
+      install_list->AddSetRegValueWorkItem(root, version_key,
+          google_update::kRegNameField,
+          ASCIIToWide(installer::PackageProperties::kPackageProductName),
+          true);    // overwrite name also
+    }
+  }
+
+  // Add any remaining work items that involve special settings for
+  // each product.
+  AddProductSpecificWorkItems(true, setup_path, new_version, package,
+                              install_list);
+
+  AddGoogleUpdateWorkItems(original_state, installer_state, package,
+                           install_list);
+
+  // Append the tasks that run after the installation.
+  AppendPostInstallTasks(multi_install,
+                         setup_path,
+                         new_chrome_exe,
+                         current_version->get(),
+                         new_version,
+                         package,
+                         install_list);
+}
+
+
+void AddRegisterComDllWorkItems(const FilePath& dll_folder,
+                                const std::vector<FilePath>& dll_list,
+                                bool system_level,
+                                bool do_register,
+                                bool ignore_failures,
+                                WorkItemList* work_item_list) {
+  DCHECK(work_item_list);
+  if (dll_list.empty()) {
+    VLOG(1) << "No COM DLLs to register";
+  } else {
+    std::vector<FilePath>::const_iterator dll_iter(dll_list.begin());
+    for (; dll_iter != dll_list.end(); ++dll_iter) {
+      FilePath dll_path = dll_folder.Append(*dll_iter);
+      WorkItem* work_item = work_item_list->AddSelfRegWorkItem(
+          dll_path.value(), do_register, !system_level);
+      DCHECK(work_item);
+      work_item->set_ignore_failure(ignore_failures);
+    }
+  }
+}
+
+void AddSetMsiMarkerWorkItem(const Product& product,
+                             bool set,
+                             WorkItemList* work_item_list) {
+  DCHECK(work_item_list);
+  BrowserDistribution* dist = product.distribution();
+  HKEY reg_root = product.system_level() ? HKEY_LOCAL_MACHINE :
+                                           HKEY_CURRENT_USER;
+  DWORD msi_value = set ? 1 : 0;
+  WorkItem* set_msi_work_item = work_item_list->AddSetRegValueWorkItem(
+      reg_root, dist->GetStateKey(), google_update::kRegMSIField,
+      msi_value, true);
+  DCHECK(set_msi_work_item);
+  set_msi_work_item->set_ignore_failure(true);
+  set_msi_work_item->set_log_message("Could not write MSI marker!");
+}
+
+void AddChromeFrameWorkItems(bool install,
+                             const FilePath& setup_path,
+                             const Version& new_version,
+                             const Product& product,
+                             WorkItemList* list) {
+  DCHECK(product.is_chrome_frame());
+  if (!product.package().multi_install()) {
+    VLOG(1) << "Not adding GCF specific work items for single install.";
+    return;
+  }
+
+  // TODO(tommi): This assumes we know exactly how ShouldCreateUninstallEntry
+  // is implemented.  Since there is logic in ChromeFrameDistribution for how
+  // to determine when this is enabled, this is how we have to figure out if
+  // this feature is enabled right now, but it's a hack and we need a cleaner
+  // way to figure this out.
+  // Note that we cannot just check the master preferences for
+  // kChromeFrameReadyMode, since there are other things that need to be correct
+  // in the environment in order to enable this feature.
+  bool ready_mode = !product.distribution()->ShouldCreateUninstallEntry();
+
+  HKEY root = product.package().system_level() ? HKEY_LOCAL_MACHINE :
+                                                 HKEY_CURRENT_USER;
+  bool update_chrome_uninstall_command = false;
+  if (ready_mode) {
+    // If GCF is being installed in ready mode, we write an entry to the
+    // multi-install state key.  If the value already exists, we will not
+    // overwrite it since the user might have opted out.
+    list->AddCreateRegKeyWorkItem(root,
+        product.package().properties()->GetStateKey());
+    list->AddSetRegValueWorkItem(root,
+        product.package().properties()->GetStateKey(),
+        installer::kChromeFrameReadyModeField,
+        install ? 1 : 0,  // The value we want to set.
+        install ? false : true);  // Overwrite existing value.
+    if (!install) {
+      // If Chrome is not also being uninstalled, we need to update its command
+      // line so that it doesn't include uninstalling Chrome Frame now.
+      update_chrome_uninstall_command =
+          (installer::FindProduct(product.package().products(),
+              BrowserDistribution::CHROME_BROWSER) == NULL);
+    }
+  } else {
+    // It doesn't matter here if we're installing or uninstalling Chrome Frame.
+    // If ready mode isn't specified on the command line for installs, we need
+    // to delete the ready mode flag from the registry if it exists - this
+    // constitutes an opt-in for the user.  If we're uninstalling CF and ready
+    // mode isn't specified on the command line, that means that CF wasn't
+    // installed with ready mode enabled (the --ready-mode switch should be set
+    // in the registry) so deleting the value should have no effect.
+    // In both cases (install/uninstall), we need to make sure that Chrome's
+    // uninstallation command line does not include the --chrome-frame switch
+    // so that uninstalling Chrome will no longer uninstall Chrome Frame.
+
+    if (RegKey(root, product.package().properties()->GetStateKey().c_str(),
+               KEY_QUERY_VALUE).Valid()) {
+      list->AddDeleteRegValueWorkItem(root,
+          product.package().properties()->GetStateKey(),
+          installer::kChromeFrameReadyModeField, false);
+    }
+
+    const Product* chrome = installer::FindProduct(product.package().products(),
+        BrowserDistribution::CHROME_BROWSER);
+    if (chrome) {
+      // Chrome is already a part of this installation run, so we can assume
+      // that the uninstallation arguments will be updated correctly.
+    } else {
+      // Chrome is not a part of this installation run, so we have to explicitly
+      // check if Chrome is installed, and if so, update its uninstallation
+      // command lines.
+      BrowserDistribution* dist = BrowserDistribution::GetSpecificDistribution(
+          BrowserDistribution::CHROME_BROWSER,
+          MasterPreferences::ForCurrentProcess());
+      update_chrome_uninstall_command =
+          IsInstalledAsMulti(product.system_level(), dist);
+    }
+  }
+
+  if (update_chrome_uninstall_command) {
+    // Chrome is not a part of this installation run, so we have to explicitly
+    // check if Chrome is installed, and if so, update its uninstallation
+    // command lines.
+    const MasterPreferences& prefs = MasterPreferences::ForCurrentProcess();
+    BrowserDistribution* chrome_dist =
+        BrowserDistribution::GetSpecificDistribution(
+            BrowserDistribution::CHROME_BROWSER, prefs);
+    const Package& pack = product.package();
+    scoped_refptr<Package> package(new Package(pack.multi_install(),
+        pack.system_level(), pack.path(), pack.properties()));
+    scoped_refptr<Product> chrome_product(new Product(chrome_dist, package));
+    AddUninstallShortcutWorkItems(setup_path, new_version, list,
+                                  *chrome_product.get());
+  }
+}
+
+void AppendUninstallCommandLineFlags(CommandLine* uninstall_cmd,
+                                     const Product& product) {
+  DCHECK(uninstall_cmd);
+
+  uninstall_cmd->AppendSwitch(installer::switches::kUninstall);
+
+  // Append the product-specific uninstall flags.
+  product.distribution()->AppendUninstallCommandLineFlags(uninstall_cmd);
+  if (product.IsMsi()) {
+    uninstall_cmd->AppendSwitch(installer::switches::kMsi);
+    // See comment in uninstall.cc where we check for the kDeleteProfile switch.
+    if (product.is_chrome_frame()) {
+      uninstall_cmd->AppendSwitch(installer::switches::kDeleteProfile);
+    }
+  }
+  if (product.system_level())
+    uninstall_cmd->AppendSwitch(installer::switches::kSystemLevel);
+
+  // Propagate switches obtained from preferences as well.
+  const MasterPreferences& prefs = MasterPreferences::ForCurrentProcess();
+  if (prefs.is_multi_install()) {
+    uninstall_cmd->AppendSwitch(installer::switches::kMultiInstall);
+  }
+  bool value = false;
+  if (prefs.GetBool(installer::master_preferences::kVerboseLogging,
+                    &value) && value)
+    uninstall_cmd->AppendSwitch(installer::switches::kVerboseLogging);
+}
+
+}  // namespace installer