Use scoped_ptr::Pass instead of scoped_ptr::PassAs<T>.

base/memory/discardable_memory_linux.cc

Index: base/memory/discardable_memory_linux.cc
diff --git a/base/memory/discardable_memory_linux.cc b/base/memory/discardable_memory_linux.cc
index f4aade3c602f574001e0383fa75093de81262f27..81ae19d746732f908f57954526d369811ef8b1b1 100644
--- a/base/memory/discardable_memory_linux.cc
+++ b/base/memory/discardable_memory_linux.cc
@@ -31,19 +31,19 @@ scoped_ptr<DiscardableMemory> DiscardableMemory::CreateLockedMemoryWithType(
       scoped_ptr<internal::DiscardableMemoryEmulated> memory(
           new internal::DiscardableMemoryEmulated(size));
       if (!memory->Initialize())
-        return scoped_ptr<DiscardableMemory>();
+        return nullptr;
 
-      return memory.PassAs<DiscardableMemory>();
+      return memory.Pass();
     }
     case DISCARDABLE_MEMORY_TYPE_NONE:
     case DISCARDABLE_MEMORY_TYPE_ASHMEM:
     case DISCARDABLE_MEMORY_TYPE_MAC:
       NOTREACHED();
-      return scoped_ptr<DiscardableMemory>();
+      return nullptr;
   }
 
   NOTREACHED();
-  return scoped_ptr<DiscardableMemory>();
+  return nullptr;
 }
 
 // static