Enable three threads for video decoding.

media/test/ffmpeg_tests/ffmpeg_tests.cc

 // 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.
 
 // Software qualification test for FFmpeg.  This test is used to certify that
 // software decoding quality and performance of FFmpeg meets a mimimum
 // standard.
 
 #include <iomanip>
 #include <iostream>
@@ skipping 69 matching lines @@
   }
 
   // Retrieve command line options.
   std::string in_path(WideToUTF8(filenames[0]));
   std::string out_path;
   if (filenames.size() > 1) {
     out_path = WideToUTF8(filenames[1]);
   }
 
   // Default flags that match Chrome defaults.
-  int video_threads = 2;
+  int video_threads = 3;
   int verbose_level = AV_LOG_FATAL;
   int max_frames = 0;
   int max_loops = 0;
   bool flush = false;
 
   unsigned int hash_value = 5381u;  // Seed for DJB2.
   bool hash_djb2 = false;
 
   MD5Context ctx;  // Intermediate MD5 data: do not use
   MD5Init(&ctx);
@@ skipping 378 matching lines @@
   } __except(EXCEPTION_EXECUTE_HANDLER) {
     *log_out << "  Exception:" << std::setw(11) << GetExceptionCode()
              << " " << in_path << std::endl;
     return 1;
   }
 #endif
   CommandLine::Reset();
   return 0;
 }