App launcher: Fix warning log on unresolvable relative paths.

apps/launcher.cc

Index: apps/launcher.cc
diff --git a/apps/launcher.cc b/apps/launcher.cc
index a4272a69b6e5e1079d1498bc278a8063048f1ea7..50cdf5de6099eea7f5940f25db90304d375fdfbb 100644
--- a/apps/launcher.cc
+++ b/apps/launcher.cc
@@ -71,8 +71,11 @@ bool DoMakePathAbsolute(const base::FilePath& current_directory,
     return true;
 
   if (current_directory.empty()) {
-    *file_path = base::MakeAbsoluteFilePath(*file_path);
-    return !file_path->empty();
+    base::FilePath absolute_path = base::MakeAbsoluteFilePath(*file_path);
+    if (absolute_path.empty())
+      return false;
+    *file_path = absolute_path;
+    return true;
   }
 
   if (!current_directory.IsAbsolute())