Update legacy Tuple-using code.

chrome/browser/safe_browsing/client_side_detection_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 "base/files/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/run_loop.h"
 #include "base/strings/stringprintf.h"
 #include "base/synchronization/waitable_event.h"
@@ skipping 312 matching lines @@
 
   void ExpectShouldClassifyForMalwareResult(bool should_classify) {
     EXPECT_EQ(should_classify, csd_host_->should_classify_for_malware_);
   }
 
   void ExpectStartPhishingDetection(const GURL* url) {
     const IPC::Message* msg = process()->sink().GetFirstMessageMatching(
         SafeBrowsingMsg_StartPhishingDetection::ID);
     if (url) {
       ASSERT_TRUE(msg);
-      Tuple1<GURL> actual_url;
+      Tuple<GURL> actual_url;
       SafeBrowsingMsg_StartPhishingDetection::Read(msg, &actual_url);
-      EXPECT_EQ(*url, actual_url.a);
+      EXPECT_EQ(*url, get<0>(actual_url));
       EXPECT_EQ(rvh()->GetRoutingID(), msg->routing_id());
       process()->sink().ClearMessages();
     } else {
       ASSERT_FALSE(msg);
     }
   }
 
   void TestUnsafeResourceCopied(const UnsafeResource& resource) {
     ASSERT_TRUE(csd_host_->unsafe_resource_.get());
     // Test that the resource from OnSafeBrowsingHit notification was copied
@@ skipping 797 matching lines @@
   EXPECT_EQ(url, resource.url);
   EXPECT_EQ(url, resource.original_url);
 
   ExpectStartPhishingDetection(NULL);
 
   // Showing a phishing warning will invalidate all the weak pointers which
   // means we will not extract malware features.
   ExpectShouldClassifyForMalwareResult(false);
 }
 }  // namespace safe_browsing