Handle uncommon download verdict for safebrowsing download protection.

chrome/browser/safe_browsing/download_protection_service.h

 // 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.
 //
 // Helper class which handles communication with the SafeBrowsing servers for
 // improved binary download protection.
 
 #ifndef CHROME_BROWSER_SAFE_BROWSING_DOWNLOAD_PROTECTION_SERVICE_H_
 #define CHROME_BROWSER_SAFE_BROWSING_DOWNLOAD_PROTECTION_SERVICE_H_
 #pragma once
@@ skipping 41 matching lines @@
     DownloadInfo();
     ~DownloadInfo();
     std::string DebugString() const;
     // Creates a DownloadInfo from a DownloadItem object.
     static DownloadInfo FromDownloadItem(const content::DownloadItem& item);
   };
 
   enum DownloadCheckResult {
     SAFE,
     DANGEROUS,
-    // In the future we may introduce a third category which corresponds to
-    // suspicious downloads that are not known to be malicious.
+    UNCOMMON,
   };
 
   // Callback type which is invoked once the download request is done.
   typedef base::Callback<void(DownloadCheckResult)> CheckDownloadCallback;
 
   // Creates a download service.  The service is initially disabled.  You need
   // to call SetEnabled() to start it.  |sb_service| owns this object; we
   // keep a reference to |request_context_getter|.
   DownloadProtectionService(
       SafeBrowsingService* sb_service,
@@ skipping 55 matching lines @@
     REASON_INVALID_RESPONSE_PROTO,
     REASON_NOT_BINARY_FILE,
     REASON_REQUEST_CANCELED,
     REASON_DOWNLOAD_DANGEROUS,
     REASON_DOWNLOAD_SAFE,
     REASON_EMPTY_URL_CHAIN,
     REASON_HTTPS_URL,
     REASON_PING_DISABLED,
     REASON_TRUSTED_EXECUTABLE,
     REASON_OS_NOT_SUPPORTED,
+    REASON_DOWNLOAD_UNCOMMON,
     REASON_MAX  // Always add new values before this one.
   };
 
  private:
   class CheckClientDownloadRequest;  // Per-request state
   friend class DownloadProtectionServiceTest;
   FRIEND_TEST_ALL_PREFIXES(DownloadProtectionServiceTest,
                            CheckClientDownloadValidateRequest);
   FRIEND_TEST_ALL_PREFIXES(DownloadProtectionServiceTest,
                            CheckClientDownloadSuccess);
@@ skipping 37 matching lines @@
   // SignatureUtil object, may be overridden for testing.
   scoped_refptr<SignatureUtil> signature_util_;
 
   int64 download_request_timeout_ms_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadProtectionService);
 };
 }  // namespace safe_browsing
 
 #endif  // CHROME_BROWSER_SAFE_BROWSING_DOWNLOAD_PROTECTION_SERVICE_H_