Update legacy Tuple-using code.

content/renderer/external_popup_menu_browsertest.cc

Index: content/renderer/external_popup_menu_browsertest.cc
diff --git a/content/renderer/external_popup_menu_browsertest.cc b/content/renderer/external_popup_menu_browsertest.cc
index cadb51ffda6b52152bb959fedb7521882984f7e6..b3fecbbaf8ac7f1c6140f560b21f73792e165649 100644
--- a/content/renderer/external_popup_menu_browsertest.cc
+++ b/content/renderer/external_popup_menu_browsertest.cc
@@ -86,10 +86,10 @@ TEST_F(ExternalPopupMenuTest, NormalCase) {
   const IPC::Message* message =
       sink.GetUniqueMessageMatching(FrameHostMsg_ShowPopup::ID);
   ASSERT_TRUE(message != NULL);
-  Tuple1<FrameHostMsg_ShowPopup_Params> param;
+  Tuple<FrameHostMsg_ShowPopup_Params> param;
   FrameHostMsg_ShowPopup::Read(message, &param);
-  ASSERT_EQ(3U, param.a.popup_items.size());
-  EXPECT_EQ(1, param.a.selected_item);
+  ASSERT_EQ(3U, get<0>(param).popup_items.size());
+  EXPECT_EQ(1, get<0>(param).selected_item);
 
   // Simulate the user canceling the popup; the index should not have changed.
   frame()->OnSelectPopupMenuItem(-1);
@@ -106,8 +106,8 @@ TEST_F(ExternalPopupMenuTest, NormalCase) {
   message = sink.GetUniqueMessageMatching(FrameHostMsg_ShowPopup::ID);
   ASSERT_TRUE(message != NULL);
   FrameHostMsg_ShowPopup::Read(message, &param);
-  ASSERT_EQ(3U, param.a.popup_items.size());
-  EXPECT_EQ(0, param.a.selected_item);
+  ASSERT_EQ(3U, get<0>(param).popup_items.size());
+  EXPECT_EQ(0, get<0>(param).selected_item);
 }
 
 // Page shows popup, then navigates away while popup showing, then select.
@@ -189,11 +189,11 @@ TEST_F(ExternalPopupMenuDisplayNoneTest, SelectItem) {
   const IPC::Message* message =
       sink.GetUniqueMessageMatching(FrameHostMsg_ShowPopup::ID);
   ASSERT_TRUE(message != NULL);
-  Tuple1<FrameHostMsg_ShowPopup_Params> param;
+  Tuple<FrameHostMsg_ShowPopup_Params> param;
   FrameHostMsg_ShowPopup::Read(message, &param);
   // Number of items should match item count minus the number
   // of "display: none" items.
-  ASSERT_EQ(5U, param.a.popup_items.size());
+  ASSERT_EQ(5U, get<0>(param).popup_items.size());
 
   // Select index 1 item. This should select item with index 2,
   // skipping the item with 'display: none'