Eliminate silently letting errors pass on pak loading.

ui/base/ui_base_paths.cc

Index: ui/base/ui_base_paths.cc
diff --git a/ui/base/ui_base_paths.cc b/ui/base/ui_base_paths.cc
index 083315d422833c6d7c59ef1d93fddc9ddb12f51e..4c39024fb282b266a2277193f6cc2cc2a3ec8c45 100644
--- a/ui/base/ui_base_paths.cc
+++ b/ui/base/ui_base_paths.cc
@@ -79,7 +79,11 @@ bool PathProvider(int key, base::FilePath* result) {
 // This cannot be done as a static initializer sadly since Visual Studio will
 // eliminate this object file if there is no direct entry point into it.
 void RegisterPathProvider() {
-  PathService::RegisterProvider(PathProvider, PATH_START, PATH_END);
+  static bool registered = false;
+  if (!registered) {
+    PathService::RegisterProvider(PathProvider, PATH_START, PATH_END);
+    registered = true;
+  }
 }
 
 }  // namespace ui