Update legacy Tuple-using code.

content/renderer/pepper/pepper_file_chooser_host_unittest.cc

Index: content/renderer/pepper/pepper_file_chooser_host_unittest.cc
diff --git a/content/renderer/pepper/pepper_file_chooser_host_unittest.cc b/content/renderer/pepper/pepper_file_chooser_host_unittest.cc
index 3df6520440e2bbb76d38406c3c4a41a955c52bfd..bfc88e60bced8fb7fda3e988e7798cb75b95a45e 100644
--- a/content/renderer/pepper/pepper_file_chooser_host_unittest.cc
+++ b/content/renderer/pepper/pepper_file_chooser_host_unittest.cc
@@ -91,7 +91,7 @@ TEST_F(PepperFileChooserHostTest, Show) {
   ASSERT_TRUE(msg);
   ViewHostMsg_RunFileChooser::Schema::Param call_msg_param;
   ASSERT_TRUE(ViewHostMsg_RunFileChooser::Read(msg, &call_msg_param));
-  const FileChooserParams& chooser_params = call_msg_param.a;
+  const FileChooserParams& chooser_params = get<0>(call_msg_param);
 
   // Basic validation of request.
   EXPECT_EQ(FileChooserParams::Open, chooser_params.mode);
@@ -123,7 +123,7 @@ TEST_F(PepperFileChooserHostTest, Show) {
   ASSERT_TRUE(
       PpapiPluginMsg_FileChooser_ShowReply::Read(&reply_msg, &reply_msg_param));
   const std::vector<ppapi::FileRefCreateInfo>& chooser_results =
-      reply_msg_param.a;
+      get<0>(reply_msg_param);
   ASSERT_EQ(1u, chooser_results.size());
   EXPECT_EQ(FilePathToUTF8(selected_info.display_name),
             chooser_results[0].display_name);