Revert "Safebrowsing: allow sending enhanced download protection pings on OSX."

chrome/common/safe_browsing/csd.proto

 // 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.
 //
 // Client side phishing and malware detection request and response
 // protocol buffers.  Those protocol messages should be kept in sync
 // with the server implementation.
 //
 // If you want to change this protocol definition or you have questions
 // regarding its format please contact chrome-anti-phishing@googlegroups.com.
@@ skipping 197 matching lines @@
   // Name of the file where the download would be stored if the
   // download completes.  E.g., "bla.exe".
   optional string file_basename = 9;
 
   // Starting with Chrome M19 we're also sending back pings for Chrome
   // extensions that get downloaded by users.
   enum DownloadType {
     WIN_EXECUTABLE = 0;    // Currently all .exe, .cab and .msi files.
     CHROME_EXTENSION = 1;  // .crx files.
     ANDROID_APK = 2;       // .apk files.
-    // .zip files containing one of the other executable types.
+    // .zip files containing one of the above executable types.
     ZIPPED_EXECUTABLE = 3;
-    MAC_EXECUTABLE = 4;    // .dmg, .pkg, etc.
   }
   optional DownloadType download_type = 10 [default = WIN_EXECUTABLE];
 
   // Locale of the device, eg en, en_US.
   optional string locale = 11;
 
   message PEImageHeaders {
     // IMAGE_DOS_HEADER.
     optional bytes dos_header = 1;
     // IMAGE_FILE_HEADER.
@@ skipping 213 matching lines @@
 }
 
 message ClientIncidentResponse {
   optional bytes token = 1;
   optional bool download_requested = 2;
 
   message EnvironmentRequest { optional int32 dll_index = 1; }
 
   repeated EnvironmentRequest environment_requests = 3;
 }