Fix NULL dereference in SearchProviderTest

chrome/browser/autocomplete/chrome_autocomplete_provider_delegate.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 "chrome/browser/autocomplete/chrome_autocomplete_provider_delegate.h"
 
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/autocomplete/autocomplete_classifier.h"
 #include "chrome/browser/autocomplete/autocomplete_classifier_factory.h"
 #include "chrome/browser/bitmap_fetcher/bitmap_fetcher_service.h"
@@ skipping 40 matching lines @@
   return scheme_classifier_;
 }
 
 void ChromeAutocompleteProviderDelegate::Classify(
     const base::string16& text,
     bool prefer_keyword,
     bool allow_exact_keyword_match,
     metrics::OmniboxEventProto::PageClassification page_classification,
     AutocompleteMatch* match,
     GURL* alternate_nav_url) {
-  AutocompleteClassifierFactory::GetForProfile(profile_)->Classify(
-      text, prefer_keyword, allow_exact_keyword_match, page_classification,
-      match, alternate_nav_url);
+  AutocompleteClassifier* classifier =
+      AutocompleteClassifierFactory::GetForProfile(profile_);
+  DCHECK(classifier);
+  classifier->Classify(text, prefer_keyword, allow_exact_keyword_match,
+                       page_classification, match, alternate_nav_url);
 }
 
 history::URLDatabase* ChromeAutocompleteProviderDelegate::InMemoryDatabase() {
   HistoryService* history_service =
       HistoryServiceFactory::GetForProfile(profile_, Profile::EXPLICIT_ACCESS);
   return history_service ? history_service->InMemoryDatabase() : NULL;
 }
 
 void
 ChromeAutocompleteProviderDelegate::DeleteMatchingURLsForKeywordFromHistory(
@@ skipping 14 matching lines @@
           syncer::PROXY_TABS) &&
       !service->GetEncryptedDataTypes().Has(syncer::SESSIONS);
 }
 
 void ChromeAutocompleteProviderDelegate::PrefetchImage(const GURL& url) {
   BitmapFetcherService* image_service =
       BitmapFetcherServiceFactory::GetForBrowserContext(profile_);
   DCHECK(image_service);
   image_service->Prefetch(url);
 }