CommandLine: eliminate wstring-accepting AppendLooseValue

chrome/test/automation/automation_proxy_uitest.cc

Index: chrome/test/automation/automation_proxy_uitest.cc
diff --git a/chrome/test/automation/automation_proxy_uitest.cc b/chrome/test/automation/automation_proxy_uitest.cc
index 1a187b9c9e1aa6fabd462f179da1d1e912b86593..7f530bcf8b00c1a75f4522cdd2435b50a1b6b797 100644
--- a/chrome/test/automation/automation_proxy_uitest.cc
+++ b/chrome/test/automation/automation_proxy_uitest.cc
@@ -343,8 +343,8 @@ class AutomationProxyTest2 : public AutomationProxyVisibleTest {
 
     document2_ = test_data_directory_.AppendASCII("title2.html");
     launch_arguments_ = CommandLine(CommandLine::ARGUMENTS_ONLY);
-    launch_arguments_.AppendLooseValue(document1_.ToWStringHack());
-    launch_arguments_.AppendLooseValue(document2_.ToWStringHack());
+    launch_arguments_.AppendArgPath(document1_);
+    launch_arguments_.AppendArgPath(document2_);
   }
 
   FilePath document1_;
@@ -560,7 +560,7 @@ class AutomationProxyTest3 : public UITest {
 
     dom_automation_enabled_ = true;
     launch_arguments_ = CommandLine(CommandLine::ARGUMENTS_ONLY);
-    launch_arguments_.AppendLooseValue(document1_.ToWStringHack());
+    launch_arguments_.AppendArgPath(document1_);
   }
 
   FilePath document1_;