Consolidate some safe-browsing histograms.

chrome/browser/safe_browsing/safe_browsing_service.h

 // Copyright (c) 2010 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.
 //
 // The Safe Browsing service is responsible for downloading anti-phishing and
 // anti-malware tables and checking urls against them.
 
 #ifndef CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_SERVICE_H_
 #define CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_SERVICE_H_
 #pragma once
@@ skipping 289 matching lines @@
   void OnResetDatabase();
 
   // Store in-memory the GetHash response. Runs on the database thread.
   void CacheHashResults(const std::vector<SBPrefix>& prefixes,
                         const std::vector<SBFullHashResult>& full_hashes);
 
   // Internal worker function for processing full hashes.
   void OnHandleGetHashResults(SafeBrowsingCheck* check,
                               const std::vector<SBFullHashResult>& full_hashes);
 
-  void HandleOneCheck(SafeBrowsingCheck* check,
+  // Run one check against |full_hashes|.  Returns |true| if the check
+  // finds a match in |full_hashes|.
+  bool HandleOneCheck(SafeBrowsingCheck* check,
                       const std::vector<SBFullHashResult>& full_hashes);
 
   // Invoked on the UI thread to show the blocking page.
   void DoDisplayBlockingPage(const UnsafeResource& resource);
 
   // As soon as we create a blocking page, we schedule this method to
   // report hits to the malware or phishing list to the server.
   void ReportSafeBrowsingHit(const GURL& malicious_url,
                              const GURL& page_url,
                              const GURL& referrer_url,
@@ skipping 64 matching lines @@
 class SafeBrowsingServiceFactory {
  public:
   SafeBrowsingServiceFactory() { }
   virtual ~SafeBrowsingServiceFactory() { }
   virtual SafeBrowsingService* CreateSafeBrowsingService() = 0;
  private:
   DISALLOW_COPY_AND_ASSIGN(SafeBrowsingServiceFactory);
 };
 
 #endif  // CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_SERVICE_H_