Update legacy Tuple-using code.

content/browser/frame_host/navigation_controller_impl_unittest.cc

Index: content/browser/frame_host/navigation_controller_impl_unittest.cc
diff --git a/content/browser/frame_host/navigation_controller_impl_unittest.cc b/content/browser/frame_host/navigation_controller_impl_unittest.cc
index 48b52c9baac1f70a5ba4bf2525ef20cfb2ee17e9..eb159be99ff84fefa2c6baab668da2332101bea1 100644
--- a/content/browser/frame_host/navigation_controller_impl_unittest.cc
+++ b/content/browser/frame_host/navigation_controller_impl_unittest.cc
@@ -225,13 +225,13 @@ class NavigationControllerTest
   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: