src/: Update the remaining include paths of string_split.h to its new location.

chromeos/network/network_event_log_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 "chromeos/network/network_event_log.h"
 
 #include <algorithm>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/format_macros.h"
-#include "base/string_split.h"
 #include "base/stringprintf.h"
+#include "base/strings/string_split.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace chromeos {
 
 class NetworkEventLogTest : public testing::Test {
  public:
   NetworkEventLogTest() {
   }
 
   virtual void SetUp() OVERRIDE {
@@ skipping 75 matching lines @@
       network_event_log::kMaxNetworkEventLogEntries + 3;
   for (size_t i = 0; i < entries_to_add; ++i)
     network_event_log::AddEntry("test", StringPrintf("event_%"PRIuS, i), "");
 
   std::string output = GetAsString(network_event_log::OLDEST_FIRST, 0);
   size_t output_lines = CountLines(output);
   EXPECT_EQ(network_event_log::kMaxNetworkEventLogEntries, output_lines);
 }
 
 }  // namespace chromeos