Move Tuple to base namespace.

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 baf63d6863a2fdaad2bb14ebff87252e0e34ac31..13d5bf40f4bb591955e7e1e8f49f46946d783909 100644
--- a/content/browser/frame_host/navigation_controller_impl_unittest.cc
+++ b/content/browser/frame_host/navigation_controller_impl_unittest.cc
@@ -237,12 +237,12 @@ class NavigationControllerTest
       return navigation_request->common_params().url;
     }
     const IPC::Message* message =
-      process()->sink().GetFirstMessageMatching(FrameMsg_Navigate::ID);
+        process()->sink().GetFirstMessageMatching(FrameMsg_Navigate::ID);
     CHECK(message);
-    Tuple<CommonNavigationParams, StartNavigationParams,
+    base::Tuple<CommonNavigationParams, StartNavigationParams,
           RequestNavigationParams> nav_params;
     FrameMsg_Navigate::Read(message, &nav_params);
-    return get<0>(nav_params).url;
+    return base::get<0>(nav_params).url;
   }
 
  protected: