Implement PlatformUtil::OpenExternal() so that mailto: can work

chrome/browser/android/chrome_jni_registrar.cc

Index: chrome/browser/android/chrome_jni_registrar.cc
diff --git a/chrome/browser/android/chrome_jni_registrar.cc b/chrome/browser/android/chrome_jni_registrar.cc
index 5b9feb93f536d8f76fd43f2f8814b643d63429a9..8cff9a9706d8bb352fa1bdf2825841df439fba74 100644
--- a/chrome/browser/android/chrome_jni_registrar.cc
+++ b/chrome/browser/android/chrome_jni_registrar.cc
@@ -93,6 +93,7 @@
 #include "chrome/browser/notifications/notification_ui_manager_android.h"
 #include "chrome/browser/password_manager/credential_android.h"
 #include "chrome/browser/permissions/permission_update_infobar_delegate_android.h"
+#include "chrome/browser/platform_util.h"
 #include "chrome/browser/prerender/external_prerender_handler_android.h"
 #include "chrome/browser/profiles/profile_android.h"
 #include "chrome/browser/search_engines/template_url_service_android.h"
@@ -278,6 +279,7 @@ static base::android::RegistrationMethod kChromeRegisteredMethods[] = {
     {"OmniboxUrlEmphasizer",
      OmniboxUrlEmphasizer::RegisterOmniboxUrlEmphasizer},
     {"OmniboxViewUtil", OmniboxViewUtil::RegisterOmniboxViewUtil},
+    {"PlatformUtil", platform_util::RegisterPlatformUtil},
     {"PartnerBookmarksReader",
      PartnerBookmarksReader::RegisterPartnerBookmarksReader},
     {"PasswordGenerationPopup",