Adding support for loading custom locale resources using a command line flag

ui/base/resource/resource_bundle_posix.cc

Index: ui/base/resource/resource_bundle_posix.cc
diff --git a/ui/base/resource/resource_bundle_posix.cc b/ui/base/resource/resource_bundle_posix.cc
index d2fe55b66120168ddf510cb003f89a02b4b0d011..b6668b855951cb4154d17e740e55f25923519f90 100644
--- a/ui/base/resource/resource_bundle_posix.cc
+++ b/ui/base/resource/resource_bundle_posix.cc
@@ -4,11 +4,14 @@
 
 #include "ui/base/resource/resource_bundle.h"
 
+#include "base/command_line.h"
+#include "base/file_path.h"
 #include "base/logging.h"
 #include "base/stl_util-inl.h"
 #include "base/string16.h"
 #include "base/string_piece.h"
 #include "base/synchronization/lock.h"
+#include "chrome/common/chrome_switches.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/data_pack.h"
 #include "ui/gfx/font.h"
@@ -112,7 +115,15 @@ std::string ResourceBundle::LoadLocaleResources(
     const std::string& pref_locale) {
   DCHECK(!locale_resources_data_) << "locale.pak already loaded";
   std::string app_locale = l10n_util::GetApplicationLocale(pref_locale);
-  FilePath locale_file_path = GetLocaleFilePath(app_locale);
+  FilePath locale_file_path;
+  CommandLine *command_line = CommandLine::ForCurrentProcess();
+  if (command_line->HasSwitch(switches::kForceLocaleResourcesPathSwitch)) {
+    locale_file_path =
+      command_line->GetSwitchValuePath(
+        switches::kForceLocaleResourcesPathSwitch);
+  } else {
+    locale_file_path = GetLocaleFilePath(app_locale);
+  }
   if (locale_file_path.empty()) {
     // It's possible that there is no locale.pak.
     NOTREACHED();