Add scoped_ptr<>::PassAs<>().

base/memory/scoped_ptr_unittest.cc

Index: base/memory/scoped_ptr_unittest.cc
diff --git a/base/memory/scoped_ptr_unittest.cc b/base/memory/scoped_ptr_unittest.cc
index ea135333eaef4cd820dfc4f7844522a420d3358e..63125dbf49bb6f349d5e3231d582141e061fe19d 100644
--- a/base/memory/scoped_ptr_unittest.cc
+++ b/base/memory/scoped_ptr_unittest.cc
@@ -45,6 +45,11 @@ scoped_ptr<ConDecLogger> TestReturnOfType(int* constructed) {
   return scoped_ptr<ConDecLogger>(new ConDecLogger(constructed));
 }
 
+scoped_ptr<ConDecLoggerParent> UpcastUsingPassAs(
+    scoped_ptr<ConDecLogger> object) {
+  return object.PassAs<ConDecLoggerParent>();
+}
+
 }  // namespace
 
 TEST(ScopedPtrTest, ScopedPtr) {
@@ -333,4 +338,20 @@ TEST(ScopedPtrTest, ReturnTypeBehavior) {
   EXPECT_EQ(0, constructed);
 }
 
+TEST(ScopedPtrTest, PassAs) {
+  int constructed = 0;
+  {
+    scoped_ptr<ConDecLogger> scoper(new ConDecLogger(&constructed));
+    EXPECT_EQ(1, constructed);
+    EXPECT_TRUE(scoper.get());
+
+    scoped_ptr<ConDecLoggerParent> scoper_parent;
+    scoper_parent = UpcastUsingPassAs(scoper.Pass());
+    EXPECT_EQ(1, constructed);
+    EXPECT_TRUE(scoper_parent.get());
+    EXPECT_FALSE(scoper.get());
+  }
+  EXPECT_EQ(0, constructed);
+}
+
 // TODO scoped_ptr_malloc