Update legacy Tuple-using code.

chrome/browser/translate/translate_manager_render_view_host_unittest.cc

Index: chrome/browser/translate/translate_manager_render_view_host_unittest.cc
diff --git a/chrome/browser/translate/translate_manager_render_view_host_unittest.cc b/chrome/browser/translate/translate_manager_render_view_host_unittest.cc
index 4f207d47b897b1d119897d2b56c0f97fd5751aa3..a9d805b56f74dba8504cf634506a5390f5e88a7c 100644
--- a/chrome/browser/translate/translate_manager_render_view_host_unittest.cc
+++ b/chrome/browser/translate/translate_manager_render_view_host_unittest.cc
@@ -135,14 +135,14 @@ class TranslateManagerRenderViewHostTest
         ChromeViewMsg_TranslatePage::ID);
     if (!message)
       return false;
-    Tuple4<int, std::string, std::string, std::string> translate_param;
+    Tuple<int, std::string, std::string, std::string> translate_param;
     ChromeViewMsg_TranslatePage::Read(message, &translate_param);
-    // Ignore translate_param.a which is the page seq no.
-    // Ignore translate_param.b which is the script injected in the page.
+    // Ignore get<0>(translate_param) which is the page seq no.
+    // Ignore get<1>(translate_param) which is the script injected in the page.
     if (original_lang)
-      *original_lang = translate_param.c;
+      *original_lang = get<2>(translate_param);
     if (target_lang)
-      *target_lang = translate_param.d;
+      *target_lang = get<3>(translate_param);
     return true;
   }