Use a direct include of strings headers in ui/, part 3.

ui/views/view_model_unittest.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 "ui/views/view_model.h"
 
-#include "base/string_number_conversions.h"
+#include "base/strings/string_number_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/views/view.h"
 
 namespace views {
 
 namespace {
 
 // Returns a string containing the x-coordinate of each of the views in |model|.
 std::string BoundsString(const ViewModel& model) {
   std::string result;
@@ skipping 69 matching lines @@
   model.MoveViewOnly(0, 1);
   EXPECT_EQ("1 0 2", ViewIDsString(model));
   EXPECT_EQ("10 11 12", BoundsString(model));
 
   model.MoveViewOnly(1, 0);
   EXPECT_EQ("0 1 2", ViewIDsString(model));
   EXPECT_EQ("10 11 12", BoundsString(model));
 }
 
 }  // namespace views