Small: Use WebBase64/UrlBase64 encoding for requests sent to the server.

components/safe_browsing_db/v4_update_protocol_manager.h

Index: components/safe_browsing_db/v4_update_protocol_manager.h
diff --git a/components/safe_browsing_db/v4_update_protocol_manager.h b/components/safe_browsing_db/v4_update_protocol_manager.h
index a5b73ad67404cd13bbebc13b6ebde197057574e9..dc342d39a2d2759ea323f312b62e6ca49992fae3 100644
--- a/components/safe_browsing_db/v4_update_protocol_manager.h
+++ b/components/safe_browsing_db/v4_update_protocol_manager.h
@@ -96,8 +96,8 @@ class V4UpdateProtocolManager : public net::URLFetcherDelegate,
                               net::HttpRequestHeaders* headers) const;
 
   // Fills a FetchThreatListUpdatesRequest protocol buffer for a request.
-  // Returns the serialized and base 64 encoded request as a string.
-  static std::string GetBase64SerializedUpdateRequestProto(
+  // Returns the serialized and base64 URL encoded request as a string.
+  static std::string GetWebBase64SerializedUpdateRequestProto(
       const StoreStateMap* store_state_map);
 
   // Parses the base64 encoded response received from the server as a