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

skia/ext/image_operations_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 <algorithm>
 #include <cmath>
 #include <iomanip>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/file_util.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "skia/ext/image_operations.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkRect.h"
 #include "ui/gfx/codec/png_codec.h"
 #include "ui/gfx/size.h"
 
 namespace {
 
 // Computes the average pixel value for the given range, inclusive.
@@ skipping 687 matching lines @@
       EXPECT_LE(fabs(SkColorGetA(dst_color) - a), 1.5f);
       EXPECT_LE(fabs(SkColorGetR(dst_color) - r), 1.5f);
       EXPECT_LE(fabs(SkColorGetG(dst_color) - g), 1.5f);
       EXPECT_LE(fabs(SkColorGetB(dst_color) - b), 1.5f);
       if (HasFailure()) {
         return;
       }
     }
   }
 }