Use GetSwitchValueASCII.

chrome/common/chrome_paths.cc

Index: chrome/common/chrome_paths.cc
diff --git a/chrome/common/chrome_paths.cc b/chrome/common/chrome_paths.cc
index aa9ae8d0013c5aee733d07d2b1f372dd1c70b89c..43827937935dd55659a6cf090871a72c4a378d37 100644
--- a/chrome/common/chrome_paths.cc
+++ b/chrome/common/chrome_paths.cc
@@ -23,11 +23,10 @@ namespace chrome {
 bool GetGearsPluginPathFromCommandLine(FilePath* path) {
 #ifndef NDEBUG
   // for debugging, support a cmd line based override
-  std::wstring plugin_path = CommandLine::ForCurrentProcess()->GetSwitchValue(
-      switches::kGearsPluginPathOverride);
-  // TODO(tc): After GetSwitchNativeValue lands, we don't need to use
-  // FromWStringHack.
-  *path = FilePath::FromWStringHack(plugin_path);
+  FilePath plugin_path =
+      CommandLine::ForCurrentProcess()->GetSwitchValuePath(
+          switches::kGearsPluginPathOverride);
+  *path = plugin_path;
   return !plugin_path.empty();
 #else
   return false;