Adds UMA histogram metrics for SafeBrowsing PVer4 methods.

chrome/browser/safe_browsing/protocol_manager.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.
 
 #ifndef CHROME_BROWSER_SAFE_BROWSING_PROTOCOL_MANAGER_H_
 #define CHROME_BROWSER_SAFE_BROWSING_PROTOCOL_MANAGER_H_
 
 // A class that implements Chrome's interface with the SafeBrowsing protocol.
 // See https://developers.google.com/safe-browsing/developers_guide_v2 for
 // protocol details.
@@ skipping 145 matching lines @@
 
     // Gethash request failed (network error).
     GET_HASH_NETWORK_ERROR,
 
     // Gethash request returned HTTP result code other than 200 or 204.
     GET_HASH_HTTP_ERROR,
 
     // Gethash attempted during error backoff, no request sent.
     GET_HASH_BACKOFF_ERROR,
 
+    // Gethash attempted before min wait duration elapsed, no request sent.
+    GET_HASH_MIN_WAIT_DURATION_ERROR,
+
     // Memory space for histograms is determined by the max.  ALWAYS
     // ADD NEW VALUES BEFORE THIS ONE.
     GET_HASH_RESULT_MAX
   };
 
   // Record a GetHash result. |is_download| indicates if the get
   // hash is triggered by download related lookup.
   static void RecordGetHashResult(bool is_download,
                                   ResultType result_type);
 
+  // Record a V4 GetHash result.
+  static void RecordGetV4HashResult(ResultType result_type);
+
   // Record HTTP response code when there's no error in fetching an HTTP
   // request, and the error code, when there is.
   // |metric_name| is the name of the UMA metric to record the response code or
   // error code against, |status| represents the status of the HTTP request, and
   // |response code| represents the HTTP response code received from the server.
   static void RecordHttpResponseOrErrorCode(
       const char* metric_name, const net::URLRequestStatus& status,
       int response_code);
 
   // Returns whether another update is currently scheduled.
@@ skipping 318 matching lines @@
       AddChunksCallback callback) = 0;
 
   // Delete chunks from the database.
   virtual void DeleteChunks(
       scoped_ptr<std::vector<SBChunkDelete> > chunk_deletes) = 0;
 };
 
 }  // namespace safe_browsing
 
 #endif  // CHROME_BROWSER_SAFE_BROWSING_PROTOCOL_MANAGER_H_