Fix auto raw pointer deduction on linux

content/renderer/presentation/presentation_dispatcher_unittest.cc

 // Copyright 2017 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 <memory>
 #include <utility>
 
 #include "base/run_loop.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "content/renderer/presentation/presentation_connection_proxy.h"
@@ skipping 698 matching lines @@
   }
   EXPECT_CALL(presentation_service_, StopListeningForScreenAvailability(gurl1_))
       .Times(1);
   EXPECT_CALL(presentation_service_, StopListeningForScreenAvailability(gurl2_))
       .Times(0);
   EXPECT_CALL(presentation_service_, StopListeningForScreenAvailability(gurl3_))
       .Times(0);
 
   // Set up |availability_set_| and |listening_status_|
   base::RunLoop run_loop;
-  for (auto& mock_observer : mock_observers_) {
+  for (auto* mock_observer : mock_observers_) {
     client()->getAvailability(
         mock_observer->urls(),
         base::MakeUnique<WebPresentationAvailabilityCallbacks>());
   }
 
   for (auto* mock_observer : mock_observers_)
     client()->startListening(mock_observer);
 
   EXPECT_CALL(mock_observer1_, availabilityChanged(false));
   EXPECT_CALL(mock_observer2_, availabilityChanged(false));
@@ skipping 53 matching lines @@
 
   for (auto* mock_observer : mock_observers_)
     EXPECT_CALL(*mock_observer, availabilityChanged(false));
 
   base::RunLoop run_loop_2;
   ChangeURLState(gurl2_, URLState::Unavailable);
   run_loop_2.RunUntilIdle();
 }
 
 }  // namespace content