Convert Pass()→std::move() for Mac build.

chrome/utility/safe_browsing/mac/udif.cc

Index: chrome/utility/safe_browsing/mac/udif.cc
diff --git a/chrome/utility/safe_browsing/mac/udif.cc b/chrome/utility/safe_browsing/mac/udif.cc
index 807a762bc9c443d3afc99d8b2923ffc856c4a81e..8e3ce0fca6a18cf51c6b0937c54cf5b75372ea80 100644
--- a/chrome/utility/safe_browsing/mac/udif.cc
+++ b/chrome/utility/safe_browsing/mac/udif.cc
@@ -4,12 +4,13 @@
 
 #include "chrome/utility/safe_browsing/mac/udif.h"
 
-#include <bzlib.h>
 #include <CoreFoundation/CoreFoundation.h>
+#include <bzlib.h>
 #include <libkern/OSByteOrder.h>
 #include <uuid/uuid.h>
 
 #include <algorithm>
+#include <utility>
 
 #include "base/logging.h"
 #include "base/mac/foundation_util.h"
@@ -470,7 +471,7 @@ bool UDIFParser::ParseBlkx() {
       }
     }
 
-    blocks_.push_back(block.Pass());
+    blocks_.push_back(std::move(block));
     partition_names_.push_back(partition_name);
   }