Implement experimental MP3 support for Media Source API.

media/base/run_all_unittests.cc

 // 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.
 
 #include "base/command_line.h"
 #include "base/test/test_suite.h"
 #include "build/build_config.h"
 #include "media/base/media.h"
 #include "media/base/media_switches.h"
 
@@ skipping 24 matching lines @@
 #endif
 
   // Run this here instead of main() to ensure an AtExitManager is already
   // present.
   media::InitializeMediaLibraryForTesting();
   // Enable VP8 alpha support for all media tests.
   // TODO(tomfinegan): Remove this once the VP8 alpha flag is removed or
   // negated.
   CommandLine* cmd_line = CommandLine::ForCurrentProcess();
   cmd_line->AppendSwitch(switches::kEnableVp8AlphaPlayback);
+  cmd_line->AppendSwitch(switches::kEnableMP3StreamParser);
 }
 
 int main(int argc, char** argv) {
   return TestSuiteNoAtExit(argc, argv).Run();
 }