Convert Pass()→std::move() in //tools

tools/gn/value.cc

Index: tools/gn/value.cc
diff --git a/tools/gn/value.cc b/tools/gn/value.cc
index 6e8bcfad5239d247cb39d226334b915aff7bf7fc..57f23b070d53242740dfb70c24ab626d7a9edbc7 100644
--- a/tools/gn/value.cc
+++ b/tools/gn/value.cc
@@ -5,6 +5,7 @@
 #include "tools/gn/value.h"
 
 #include <stddef.h>
+#include <utility>
 
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
@@ -60,9 +61,8 @@ Value::Value(const ParseNode* origin, scoped_ptr<Scope> scope)
       string_value_(),
       boolean_value_(false),
       int_value_(0),
-      scope_value_(scope.Pass()),
-      origin_(origin) {
-}
+      scope_value_(std::move(scope)),
+      origin_(origin) {}
 
 Value::Value(const Value& other)
     : type_(other.type_),
@@ -113,7 +113,7 @@ const char* Value::DescribeType(Type t) {
 
 void Value::SetScopeValue(scoped_ptr<Scope> scope) {
   DCHECK(type_ == SCOPE);
-  scope_value_ = scope.Pass();
+  scope_value_ = std::move(scope);
 }
 
 std::string Value::ToString(bool quote_string) const {