Eliminate silently letting errors pass on pak loading.

ui/base/ui_base_paths.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/base/ui_base_paths.h"
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
@@ skipping 61 matching lines @@
       !base::CreateDirectory(cur))
     return false;
 
   *result = cur;
   return true;
 }
 
 // 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