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

net/disk_cache/blockfile/block_files.cc

Index: net/disk_cache/blockfile/block_files.cc
diff --git a/net/disk_cache/blockfile/block_files.cc b/net/disk_cache/blockfile/block_files.cc
index f7cc38178f4b8ffb10cd10e3291cc9bbdf7d2bb4..10798dae2bfe97beed1ed812b60364b5565f1410 100644
--- a/net/disk_cache/blockfile/block_files.cc
+++ b/net/disk_cache/blockfile/block_files.cc
@@ -432,7 +432,7 @@ bool BlockFiles::IsValid(Addr address) {
 
   static bool read_contents = false;
   if (read_contents) {
-    scoped_ptr<char[]> buffer;
+    std::unique_ptr<char[]> buffer;
     buffer.reset(new char[Addr::BlockSizeForFileType(BLOCK_4K) * 4]);
     size_t size = address.BlockSize() * address.num_blocks();
     size_t offset = address.start_block() * address.BlockSize() +