EDK: More scoped_ptr -> std::unique_ptr conversions.

mojo/edk/embedder/simple_platform_shared_buffer_posix.cc

 // Copyright 2014 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.
 
 #include "mojo/edk/embedder/simple_platform_shared_buffer.h"
 
 #include <stdint.h>
 #include <stdio.h>     // For |fileno()|.
 #include <sys/mman.h>  // For |mmap()|/|munmap()|.
 #include <sys/stat.h>
@@ skipping 102 matching lines @@
   }
 
   // TODO(vtl): More checks?
 
   handle_ = platform_handle.Pass();
   return true;
 }
 
 #endif  // !defined(OS_ANDROID)
 
-scoped_ptr<PlatformSharedBufferMapping> SimplePlatformSharedBuffer::MapImpl(
-    size_t offset,
-    size_t length) {
+std::unique_ptr<PlatformSharedBufferMapping>
+SimplePlatformSharedBuffer::MapImpl(size_t offset, size_t length) {
   size_t offset_rounding = offset % base::SysInfo::VMAllocationGranularity();
   size_t real_offset = offset - offset_rounding;
   size_t real_length = length + offset_rounding;
 
   // This should hold (since we checked |num_bytes| versus the maximum value of
   // |off_t| on creation, but it never hurts to be paranoid.
   DCHECK_LE(static_cast<uint64_t>(real_offset),
             static_cast<uint64_t>(std::numeric_limits<off_t>::max()));
 
   void* real_base =
       mmap(nullptr, real_length, PROT_READ | PROT_WRITE, MAP_SHARED,
            handle_.get().fd, static_cast<off_t>(real_offset));
   // |mmap()| should return |MAP_FAILED| (a.k.a. -1) on error. But it shouldn't
   // return null either.
   if (real_base == MAP_FAILED || !real_base) {
     PLOG(ERROR) << "mmap";
     return nullptr;
   }
 
   void* base = static_cast<char*>(real_base) + offset_rounding;
-  return make_scoped_ptr(new SimplePlatformSharedBufferMapping(
-      base, length, real_base, real_length));
+  // Note: We can't use |MakeUnique| here, since it's not a friend of
+  // |SimplePlatformSharedBufferMapping| (only we are).
+  return std::unique_ptr<SimplePlatformSharedBufferMapping>(
+      new SimplePlatformSharedBufferMapping(base, length, real_base,
+                                            real_length));
 }
 
 // SimplePlatformSharedBufferMapping -------------------------------------------
 
 void SimplePlatformSharedBufferMapping::Unmap() {
   int result = munmap(real_base_, real_length_);
   PLOG_IF(ERROR, result != 0) << "munmap";
 }
 
 }  // namespace embedder
 }  // namespace mojo