Replace base::Tuple in //chrome with std::tuple

chrome/browser/ui/search/search_ipc_router_unittest.cc

Index: chrome/browser/ui/search/search_ipc_router_unittest.cc
diff --git a/chrome/browser/ui/search/search_ipc_router_unittest.cc b/chrome/browser/ui/search/search_ipc_router_unittest.cc
index 081409b6ab2c5fa219fbe0a87d376c37a97178e9..0fd54b1642e0a164e51221bd7df2453d8bbffaf2 100644
--- a/chrome/browser/ui/search/search_ipc_router_unittest.cc
+++ b/chrome/browser/ui/search/search_ipc_router_unittest.cc
@@ -6,6 +6,7 @@
 
 #include <stdint.h>
 
+#include <tuple>
 #include <vector>
 
 #include "base/command_line.h"
@@ -13,7 +14,6 @@
 #include "base/metrics/field_trial.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
-#include "base/tuple.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/search/search.h"
 #include "chrome/browser/search_engines/template_url_service_factory.h"
@@ -159,11 +159,11 @@ class SearchIPCRouterTest : public BrowserWithTestWindowTest {
     const IPC::Message* message = process()->sink().GetFirstMessageMatching(
         ChromeViewMsg_SearchBoxSetDisplayInstantResults::ID);
     EXPECT_NE(static_cast<const IPC::Message*>(NULL), message);
-    base::Tuple<bool> display_instant_results_param;
+    std::tuple<bool> display_instant_results_param;
     ChromeViewMsg_SearchBoxSetDisplayInstantResults::Read(
         message, &display_instant_results_param);
     EXPECT_EQ(expected_param_value,
-              base::get<0>(display_instant_results_param));
+              std::get<0>(display_instant_results_param));
   }
 
   MockSearchIPCRouterDelegate* mock_delegate() { return &delegate_; }