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

base/memory/discardable_memory_mac.cc

Index: base/memory/discardable_memory_mac.cc
diff --git a/base/memory/discardable_memory_mac.cc b/base/memory/discardable_memory_mac.cc
index 01194ec8d785763aa0b61715a58f1b442d8e8a06..0bdc9eed1175bd9ed9089942e53dc4e7068239df 100644
--- a/base/memory/discardable_memory_mac.cc
+++ b/base/memory/discardable_memory_mac.cc
@@ -176,26 +176,26 @@ scoped_ptr<DiscardableMemory> DiscardableMemory::CreateLockedMemoryWithType(
     case DISCARDABLE_MEMORY_TYPE_MAC: {
       scoped_ptr<DiscardableMemoryMac> memory(new DiscardableMemoryMac(size));
       if (!memory->Initialize())
-        return scoped_ptr<DiscardableMemory>();
+        return nullptr;
 
-      return memory.PassAs<DiscardableMemory>();
+      return memory.Pass();
     }
     case DISCARDABLE_MEMORY_TYPE_EMULATED: {
       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:
       NOTREACHED();
-      return scoped_ptr<DiscardableMemory>();
+      return nullptr;
   }
 
   NOTREACHED();
-  return scoped_ptr<DiscardableMemory>();
+  return nullptr;
 }
 
 // static