Update scoped_ptr references to be unique_ptr in src/base comments.

base/memory/scoped_vector_unittest.cc

Index: base/memory/scoped_vector_unittest.cc
diff --git a/base/memory/scoped_vector_unittest.cc b/base/memory/scoped_vector_unittest.cc
index ea3dcdc4858f225ef1d4fb9ceb0e4a6fc5048ef7..916dab9a15c6ef5c674059e315fe9530c6887b4c 100644
--- a/base/memory/scoped_vector_unittest.cc
+++ b/base/memory/scoped_vector_unittest.cc
@@ -322,7 +322,7 @@ TEST(ScopedVectorTest, InsertRange) {
     EXPECT_EQ(LC_CONSTRUCTED, it->life_cycle_state());
 }
 
-// Assertions for push_back(scoped_ptr).
+// Assertions for push_back(unique_ptr).
 TEST(ScopedVectorTest, PushBackScopedPtr) {
   int delete_counter = 0;
   std::unique_ptr<DeleteCounter> elem(new DeleteCounter(&delete_counter));