Update legacy Tuple-using code.

content/browser/frame_host/navigation_controller_impl_unittest.cc

 // Copyright 2013 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 "base/basictypes.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/stl_util.h"
@@ skipping 207 matching lines @@
             switches::kEnableBrowserSideNavigation)) {
       return process()->sink().GetFirstMessageMatching(
           FrameMsg_RequestNavigation::ID);
     }
     return process()->sink().GetFirstMessageMatching(FrameMsg_Navigate::ID);
   }
 
   const GURL GetNavigationURLFromIPC(const IPC::Message* message) {
     if (base::CommandLine::ForCurrentProcess()->HasSwitch(
             switches::kEnableBrowserSideNavigation)) {
-      Tuple2<CommonNavigationParams, RequestNavigationParams> nav_params;
+      Tuple<CommonNavigationParams, RequestNavigationParams> nav_params;
       FrameMsg_RequestNavigation::Read(message, &nav_params);
-      return nav_params.a.url;
+      return get<0>(nav_params).url;
     }
-    Tuple1<FrameMsg_Navigate_Params> nav_params;
+    Tuple<FrameMsg_Navigate_Params> nav_params;
     FrameMsg_Navigate::Read(message, &nav_params);
-    return nav_params.a.common_params.url;
+    return get<0>(nav_params).common_params.url;
   }
 
  protected:
   GURL navigated_url_;
   size_t navigation_entry_committed_counter_;
 };
 
 void RegisterForAllNavNotifications(TestNotificationTracker* tracker,
                                     NavigationController* controller) {
   tracker->ListenFor(NOTIFICATION_NAV_LIST_PRUNED,
@@ skipping 4142 matching lines @@
   params.post_id = -1;
   contents()->GetMainFrame()->SendNavigateWithParams(&params);
 
   // Now reload. replaceState overrides the POST, so we should not show a
   // repost warning dialog.
   controller_impl().Reload(true);
   EXPECT_EQ(0, delegate->repost_form_warning_count());
 }
 
 }  // namespace content