Change scoped_ptr to std::unique_ptr in //net/disk_cache.

net/disk_cache/blockfile/mapped_file.cc

Index: net/disk_cache/blockfile/mapped_file.cc
diff --git a/net/disk_cache/blockfile/mapped_file.cc b/net/disk_cache/blockfile/mapped_file.cc
index d26cead89aab2064646b598e8b7b0ac5f0520c1e..571f21fed16cb1f95b34445ec1248936369ea925 100644
--- a/net/disk_cache/blockfile/mapped_file.cc
+++ b/net/disk_cache/blockfile/mapped_file.cc
@@ -5,8 +5,7 @@
 #include "net/disk_cache/blockfile/mapped_file.h"
 
 #include <algorithm>
-
-#include "base/memory/scoped_ptr.h"
+#include <memory>
 
 namespace disk_cache {
 
@@ -38,7 +37,7 @@ bool MappedFile::Store(const FileBlock* block,
 
 bool MappedFile::Preload() {
   size_t file_len = GetLength();
-  scoped_ptr<char[]> buf(new char[file_len]);
+  std::unique_ptr<char[]> buf(new char[file_len]);
   if (!Read(buf.get(), file_len, 0))
     return false;
   return true;