Change scoped_ptr to a type alias for std::unique_ptr for OS_ANDROID

base/memory/scoped_ptr.h

 // Copyright (c) 2012 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.
 
 // Scopers help you manage ownership of a pointer, helping you easily manage a
 // pointer within a scope, and automatically destroying the pointer at the end
 // of a scope.  There are two main classes you will use, which correspond to the
 // operators new/delete and new[]/delete[].
 //
 // Example usage (scoped_ptr<T>):
@@ skipping 105 matching lines @@
   inline void operator()(void* ptr) const {
     free(ptr);
   }
 };
 
 }  // namespace base
 
 // Now that scoped_ptr is almost 100% compatible with std::unique_ptr, we're
 // incrementally migrating scoped_ptr to just be a type alias for
 // std::unique_ptr. The eventual goal is to delete scoped_ptr altogether.
-#if defined(OS_LINUX) || defined(OS_WIN)
+#if defined(OS_LINUX) || defined(OS_WIN) || defined(OS_ANDROID)
 template <typename T, typename D = std::default_delete<T>>
 using scoped_ptr = std::unique_ptr<T, D>;
 
 // Versions of libstdc++ 4.8 lack overloads for <, <=, >, and >= when comparing
 // a std::unique_ptr and nullptr_t.
 #if defined(__GLIBCXX__) && __GLIBCXX__ < 20150123
 template <class T, class D>
 bool operator<(const scoped_ptr<T, D>& p, std::nullptr_t) {
   return p.get() < nullptr;
 }
@@ skipping 534 matching lines @@
 
 // A function to convert T* into scoped_ptr<T>
 // Doing e.g. make_scoped_ptr(new FooBarBaz<type>(arg)) is a shorter notation
 // for scoped_ptr<FooBarBaz<type> >(new FooBarBaz<type>(arg))
 template <typename T>
 scoped_ptr<T> make_scoped_ptr(T* ptr) {
   return scoped_ptr<T>(ptr);
 }
 
 #endif  // BASE_MEMORY_SCOPED_PTR_H_