Use a direct include of strings headers in chrome/installer/, part 2.

chrome/installer/util/installation_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/installation_state.h"
 
 #include "base/logging.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "base/version.h"
 #include "base/win/registry.h"
 #include "chrome/installer/util/google_update_constants.h"
 #include "chrome/installer/util/install_util.h"
 
 namespace installer {
 
 ProductState::ProductState()
     : uninstall_command_(CommandLine::NO_PROGRAM),
       eula_accepted_(0),
@@ skipping 249 matching lines @@
 }
 
 const ProductState* InstallationState::GetProductState(
     bool system_install,
     BrowserDistribution::Type type) const {
   const ProductState* product_state =
       GetNonVersionedProductState(system_install, type);
   return product_state->version_.get() == NULL ? NULL : product_state;
 }
 }  // namespace installer