Update legacy Tuple-using code.

content/renderer/screen_orientation/screen_orientation_dispatcher_unittest.cc

 // Copyright 2014 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 "screen_orientation_dispatcher.h"
 
 #include <list>
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 57 matching lines @@
  protected:
   void SetUp() override {
     dispatcher_.reset(new ScreenOrientationDispatcherWithSink(&sink_));
   }
 
   int GetFirstLockRequestIdFromSink() {
     const IPC::Message* msg = sink().GetFirstMessageMatching(
         ScreenOrientationHostMsg_LockRequest::ID);
     EXPECT_TRUE(msg != NULL);
 
-    Tuple2<blink::WebScreenOrientationLockType,int> params;
+    Tuple<blink::WebScreenOrientationLockType,int> params;
     ScreenOrientationHostMsg_LockRequest::Read(msg, &params);
-    return params.b;
+    return get<1>(params);
   }
 
   IPC::TestSink& sink() {
     return sink_;
   }
 
   void LockOrientation(blink::WebScreenOrientationLockType orientation,
                        blink::WebLockOrientationCallback* callback) {
     dispatcher_->lockOrientation(orientation, callback);
   }
@@ skipping 144 matching lines @@
   EXPECT_FALSE(callback_results1.succeeded_);
   EXPECT_TRUE(callback_results1.failed_);
   EXPECT_EQ(blink::WebLockOrientationErrorCanceled, callback_results1.error_);
 
   // Second request is still pending.
   EXPECT_FALSE(callback_results2.succeeded_);
   EXPECT_FALSE(callback_results2.failed_);
 }
 
 }  // namespace content