Fix clang-tidy performance warnings.
* Use const reference parameter type to avoid unnecessary copy.
Bug: 30407689
Change-Id: Iefab05c077367f272abf545036b853e8a295c8cd
Test: build with WITH_TIDY=1
diff --git a/tools/atree/atree.cpp b/tools/atree/atree.cpp
index b134e01..7deca7e 100644
--- a/tools/atree/atree.cpp
+++ b/tools/atree/atree.cpp
@@ -92,7 +92,7 @@
// Escape the filename so that it can be added to the makefile properly.
static string
-escape_filename(const string name)
+escape_filename(const string& name)
{
ostringstream new_name;
for (string::const_iterator iter = name.begin(); iter != name.end(); ++iter)