Remove implicit conversions from scoped_refptr to T* in chrome/browser/autocomplete/

chrome/browser/autocomplete/shortcuts_provider.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 "chrome/browser/autocomplete/shortcuts_provider.h"
 
 #include <algorithm>
 #include <cmath>
 #include <map>
 #include <vector>
@@ skipping 83 matching lines @@
 
 void ShortcutsProvider::DeleteMatch(const AutocompleteMatch& match) {
   // Copy the URL since deleting from |matches_| will invalidate |match|.
   GURL url(match.destination_url);
   DCHECK(url.is_valid());
 
   // When a user deletes a match, he probably means for the URL to disappear out
   // of history entirely. So nuke all shortcuts that map to this URL.
   scoped_refptr<ShortcutsBackend> backend =
       ShortcutsBackendFactory::GetForProfileIfExists(profile_);
-  if (backend) // Can be NULL in Incognito.
+  if (backend.get())  // Can be NULL in Incognito.
     backend->DeleteShortcutsWithURL(url);
 
   matches_.erase(std::remove_if(matches_.begin(), matches_.end(),
                                 DestinationURLEqualsURL(url)),
                  matches_.end());
   // NOTE: |match| is now dead!
 
   // Delete the match from the history DB. This will eventually result in a
   // second call to DeleteShortcutsWithURL(), which is harmless.
   HistoryService* const history_service =
@@ skipping 289 matching lines @@
   // (1.0 / each 5 additional hits), up to a maximum of 5x as long.
   const double kMaxDecaySpeedDivisor = 5.0;
   const double kNumUsesPerDecaySpeedDivisorIncrement = 5.0;
   double decay_divisor = std::min(kMaxDecaySpeedDivisor,
       (shortcut.number_of_hits + kNumUsesPerDecaySpeedDivisorIncrement - 1) /
       kNumUsesPerDecaySpeedDivisorIncrement);
 
   return static_cast<int>((base_score / exp(decay_exponent / decay_divisor)) +
       0.5);
 }