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

net/disk_cache/blockfile/mapped_file_posix.cc

Index: net/disk_cache/blockfile/mapped_file_posix.cc
diff --git a/net/disk_cache/blockfile/mapped_file_posix.cc b/net/disk_cache/blockfile/mapped_file_posix.cc
index 5ff2824fca6e6968bb5f916fe85655e4d97923fe..99cf49c1890dfbd5d474460666aaa3bc420d170a 100644
--- a/net/disk_cache/blockfile/mapped_file_posix.cc
+++ b/net/disk_cache/blockfile/mapped_file_posix.cc
@@ -31,7 +31,7 @@ void* MappedFile::Init(const base::FilePath& name, size_t size) {
     buffer_ = 0;
 
   // Make sure we detect hardware failures reading the headers.
-  scoped_ptr<char[]> temp(new char[temp_len]);
+  std::unique_ptr<char[]> temp(new char[temp_len]);
   if (!Read(temp.get(), temp_len, 0))
     return NULL;