[C++11] Convert DWARF parser to range-based for loops

llvm-svn: 203766
diff --git a/llvm/lib/DebugInfo/DWARFDebugLine.cpp b/llvm/lib/DebugInfo/DWARFDebugLine.cpp
index 83490b1..43d9764 100644
--- a/llvm/lib/DebugInfo/DWARFDebugLine.cpp
+++ b/llvm/lib/DebugInfo/DWARFDebugLine.cpp
@@ -90,9 +90,9 @@
     OS << "Address            Line   Column File   ISA Discriminator Flags\n"
        << "------------------ ------ ------ ------ --- ------------- "
           "-------------\n";
-    for (std::vector<Row>::const_iterator pos = Rows.begin(),
-         end = Rows.end(); pos != end; ++pos)
-      pos->dump(OS);
+    for (const Row &R : Rows) {
+      R.dump(OS);
+    }
   }
 }