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

components/network_hints/renderer/dns_prefetch_queue.h

 // Copyright (c) 2011 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.
 
 // DnsQueue is implemented as an almost FIFO circular buffer for text
 // strings that don't have embedded nulls ('\0').  The "almost" element is that
 // some duplicate strings may be removed (i.e., the string won't really be
 // pushed *if* the class happens to notice that a duplicate is already in the
 // queue).
 // The buffers internal format is null terminated character strings
 // (a.k.a., c_strings).
 // It is written to be as fast as possible during push() operations, so
 // that there will be minimal performance impact on a supplier thread.
 // The push() operation will not block, and no memory allocation is involved
 // (internally) during the push operations.
 // The one caveat is that if there is insufficient space in the buffer to
 // accept additional string via a push(), then the push() will fail, and
 // the buffer will be unmodified.
 
 // This class was designed for use in DNS prefetch operations.  During
 // rendering, the supplier is the renderer (typically), and the consumer
 // is a thread that sends messages to an async DNS resolver.
 
 #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 {
 
 // A queue of DNS lookup requests for internal use within the network_hints
 // component.
 class DnsQueue {
  public:
   // BufferSize is a signed type used for indexing into a buffer.
   typedef int32_t BufferSize;
 
@@ skipping 26 matching lines @@
     return Push(source.c_str(), source.length());
   }
 
   // Extract the next available string from the buffer.
   // If the buffer is empty, then return false.
   bool Pop(std::string* out_string);
 
  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_.
 
   // If writable_ == readable_, then the buffer is empty.
   BufferSize readable_;  // Next readable char in buffer_.
   BufferSize writeable_;  // The next space in buffer_ to push.
 
   // Number of queued strings
   size_t size_;
 
   DISALLOW_COPY_AND_ASSIGN(DnsQueue);
 };  // class DnsQueue
 
 }  // namespace network_hints
 
 #endif  // COMPONENTS_NETWORK_HINTS_RENDERER_DNS_PREFETCH_QUEUE_H__