Use a direct include of strings headers in rlz/, sandbox/, skia/, sql/, sync/.

sandbox/linux/suid/client/setuid_sandbox_client_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 "base/environment.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/string_number_conversions.h"
+#include "base/strings/string_number_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #include "sandbox/linux/suid/common/sandbox.h"
 #include "setuid_sandbox_client.h"
 
 namespace sandbox {
 
 TEST(SetuidSandboxClient, SetupLaunchEnvironment) {
   const char kTestValue[] = "This is a test";
   scoped_ptr<base::Environment> env(base::Environment::Create());
@@ skipping 66 matching lines @@
   EXPECT_TRUE(env->SetVar(kSandboxEnvironmentApiProvides,
               base::IntToString(kSUIDSandboxApiNumber + 1)));
   EXPECT_FALSE(sandbox_client->IsSuidSandboxUpToDate());
   // We didn't go through the actual sandboxing mechanism as it is
   // very hard in a unit test.
   EXPECT_FALSE(sandbox_client->IsSandboxed());
 }
 
 }  // namespace sandbox