Use a direct include of strings headers in chrome/browser/r*-s*/.

chrome/browser/safe_browsing/protocol_parser_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.
 //
 // Program to test the SafeBrowsing protocol parsing v2.1.
 
-#include "base/stringprintf.h"
+#include "base/strings/stringprintf.h"
 #include "chrome/browser/safe_browsing/protocol_parser.h"
 #include "chrome/browser/safe_browsing/safe_browsing_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 // Test parsing one add chunk.
 TEST(SafeBrowsingProtocolParsingTest, TestAddChunk) {
   std::string add_chunk("a:1:4:35\naaaax1111\0032222333344447777\00288889999");
   add_chunk[13] = '\0';
 
   // Run the parse.
@@ skipping 757 matching lines @@
   EXPECT_EQ(chunks[0].hosts[0].host, 0);
   SBEntry* entry = chunks[0].hosts[0].entry;
   EXPECT_TRUE(entry->IsSub());
   ASSERT_FALSE(entry->IsPrefix());
   ASSERT_EQ(entry->prefix_count(), 1);
   EXPECT_EQ(entry->ChunkIdAtPrefix(0), 0x31313131);
   SBFullHash full;
   memcpy(full.full_hash, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", 32);
   EXPECT_TRUE(entry->FullHashAt(0) == full);
 }