Update legacy Tuple-using code.

content/browser/renderer_host/pepper/pepper_printing_host_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/pepper/browser_ppapi_host_test.h"
 #include "content/browser/renderer_host/pepper/pepper_print_settings_manager.h"
 #include "content/browser/renderer_host/pepper/pepper_printing_host.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/host/host_message_context.h"
 #include "ppapi/host/ppapi_host.h"
@@ skipping 87 matching lines @@
       &reply_params,
       &reply_msg));
 
   // Validation of reply.
   EXPECT_EQ(call_params.sequence(), reply_params.sequence());
   EXPECT_EQ(PP_OK, reply_params.result());
   PpapiPluginMsg_Printing_GetDefaultPrintSettingsReply::Schema::Param
       reply_msg_param;
   ASSERT_TRUE(PpapiPluginMsg_Printing_GetDefaultPrintSettingsReply::Read(
       &reply_msg, &reply_msg_param));
-  PP_PrintSettings_Dev actual_settings = reply_msg_param.a;
+  PP_PrintSettings_Dev actual_settings = get<0>(reply_msg_param);
 
   EXPECT_TRUE(PP_RectEqual(expected_settings.printable_area,
                            actual_settings.printable_area));
   EXPECT_TRUE(PP_RectEqual(expected_settings.content_area,
                            actual_settings.content_area));
   EXPECT_TRUE(
       PP_SizeEqual(expected_settings.paper_size, actual_settings.paper_size));
   EXPECT_EQ(expected_settings.dpi, actual_settings.dpi);
   EXPECT_EQ(expected_settings.orientation, actual_settings.orientation);
   EXPECT_EQ(expected_settings.print_scaling_option,
             actual_settings.print_scaling_option);
   EXPECT_EQ(expected_settings.grayscale, actual_settings.grayscale);
   EXPECT_EQ(expected_settings.format, actual_settings.format);
 }
 
 }  // namespace content