Add crash keys for the installer covering simple InstallerState fields.

chrome/installer/util/installer_state.cc

 // Copyright (c) 2012 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/installer/util/installer_state.h"
 
 #include <algorithm>
 #include <functional>
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/file_version_info.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/strings/string16.h"

[grt (UTC plus 2), 2015/11/27 19:37:03]

move this to the .h since it's needed by consumers of the api

 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/win/registry.h"
 #include "base/win/scoped_handle.h"
 #include "chrome/installer/util/delete_tree_work_item.h"
 #include "chrome/installer/util/helper.h"
 #include "chrome/installer/util/install_util.h"
 #include "chrome/installer/util/installation_state.h"
 #include "chrome/installer/util/master_preferences.h"
 #include "chrome/installer/util/master_preferences_constants.h"
@@ skipping 661 matching lines @@
   }
   if (!install_list->Do())
     LOG(ERROR) << "Failed to record installer error information in registry.";
 }
 
 bool InstallerState::RequiresActiveSetup() const {
   return system_install() && FindProduct(BrowserDistribution::CHROME_BROWSER);
 }
 
 }  // namespace installer