Update chrome/ to use scoped_refptr<T>::get() rather than implicit "operator T*"

chrome/browser/safe_browsing/protocol_manager_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/stringprintf.h"
 #include "base/test/test_simple_task_runner.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/time.h"
 #include "chrome/browser/safe_browsing/protocol_manager.h"
@@ skipping 280 matching lines @@
 // |callback| since SafeBrowsingProtocolManager is not re-entrant at the time
 // this is called. This guarantee is part of the
 // SafeBrowsingProtocolManagerDelegate contract.
 void HandleAddChunks(
     const std::string& unused_list,
     SBChunkList* chunks,
     SafeBrowsingProtocolManagerDelegate::AddChunksCallback callback) {
   delete chunks;
   scoped_refptr<base::SingleThreadTaskRunner> task_runner(
       base::ThreadTaskRunnerHandle::Get());
-  if (!task_runner)
+  if (!task_runner.get())
     return;
   task_runner->PostTask(FROM_HERE, callback);
 }
 
 }  // namespace
 
 // Tests that the Update protocol will be skipped if there are problems
 // accessing the database.
 TEST_F(SafeBrowsingProtocolManagerTest, ProblemAccessingDatabase) {
   scoped_refptr<base::TestSimpleTaskRunner> runner(
@@ skipping 750 matching lines @@
   second_chunk_url_fetcher->delegate()->OnURLFetchComplete(
       second_chunk_url_fetcher);
 
   EXPECT_FALSE(pm->IsUpdateScheduled());
 
   // Invoke the AddChunksCallback to finish the update.
   runner->RunPendingTasks();
 
   EXPECT_TRUE(pm->IsUpdateScheduled());
 }