Call scoped_refptr<T>::get() rather than relying on implicit "operator T*"

content/browser/indexed_db/indexed_db_database_unittest.cc

 // Copyright 2013 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/indexed_db/indexed_db_database.h"
 
 #include <gtest/gtest.h>
 
 #include "base/auto_reset.h"
 #include "base/logging.h"
@@ skipping 119 matching lines @@
                      IndexedDBDatabaseMetadata::DEFAULT_INT_VERSION);
 
   EXPECT_FALSE(backing_store->HasOneRef());  // local and connection
 
   db->Close(connection1);
 
   EXPECT_FALSE(backing_store->HasOneRef());  // local and connection
 
   db->Close(connection2);
   EXPECT_TRUE(backing_store->HasOneRef());
-  EXPECT_FALSE(db->BackingStore());
+  EXPECT_FALSE(db->BackingStore().get());
 
   db = NULL;
 }
 
 class MockIDBDatabaseCallbacks : public IndexedDBDatabaseCallbacksWrapper {
  public:
   static scoped_refptr<MockIDBDatabaseCallbacks> Create() {
     return make_scoped_refptr(new MockIDBDatabaseCallbacks());
   }
   virtual void OnVersionChange(int64 old_version, int64 new_version) OVERRIDE {}
@@ skipping 40 matching lines @@
   const std::vector<int64> scope;
   web_database.createTransaction(
       transaction_id, 0, scope, indexed_db::TRANSACTION_READ_ONLY);
 
   web_database.forceClose();
 
   EXPECT_TRUE(backing_store->HasOneRef());  // local
 }
 
 }  // namespace content