Update the remaining include paths of base/string_piece.h to its new location.

media/base/ranges_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 "media/base/ranges.h"
+
 #include <sstream>
 
-#include "media/base/ranges.h"
-
-#include "base/string_piece.h"
+#include "base/strings/string_piece.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace media {
 
 // Human-readable output operator, for debugging/testability.
 template<class T>
 std::ostream& operator<<(std::ostream& os, const Ranges<T>& r) {
   os << "{ ";
   for(size_t i = 0; i < r.size(); ++i)
     os << "[" << r.start(i) << "," << r.end(i) << ") ";
@@ skipping 122 matching lines @@
   // first range and ends at the end of the last range.
   b.clear();
   ASSERT_EQ(b.Add(0, 12), 1u) << b;
   ASSERT_RANGES(a, "{ [0,1) [4,7) [10,12) }");
   ASSERT_RANGES(b, "{ [0,12) }");
   ASSERT_RANGES(a.IntersectionWith(b), "{ [0,1) [4,7) [10,12) }");
   ASSERT_RANGES(b.IntersectionWith(a), "{ [0,1) [4,7) [10,12) }");
 }
 
 }  // namespace media