Convert //components/[f-n]* from scoped_ptr to std::unique_ptr

components/network_hints/renderer/dns_prefetch_queue.h

Index: components/network_hints/renderer/dns_prefetch_queue.h
diff --git a/components/network_hints/renderer/dns_prefetch_queue.h b/components/network_hints/renderer/dns_prefetch_queue.h
index 2e03f24e494974080ee641fa64f1ed6049c31e21..6f451eb15db603b40639d0c846ee8bf3e57fcf67 100644
--- a/components/network_hints/renderer/dns_prefetch_queue.h
+++ b/components/network_hints/renderer/dns_prefetch_queue.h
@@ -24,13 +24,13 @@
 #ifndef COMPONENTS_NETWORK_HINTS_RENDERER_DNS_PREFETCH_QUEUE_H__
 #define COMPONENTS_NETWORK_HINTS_RENDERER_DNS_PREFETCH_QUEUE_H__
 
-#include <string>
-
 #include <stddef.h>
 #include <stdint.h>
 
+#include <memory>
+#include <string>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 
 namespace network_hints {
 
@@ -77,7 +77,8 @@ class DnsQueue {
  private:
   bool Validate();  // Checks that all internal data is valid.
 
-  const scoped_ptr<char[]> buffer_;  // Circular buffer, plus extra char ('\0').
+  // Circular buffer, plus extra char ('\0').
+  const std::unique_ptr<char[]> buffer_;
   const BufferSize buffer_size_;  // Size one smaller than allocated space.
   const BufferSize buffer_sentinel_;  // Index of extra '\0' at end of buffer_.