Enable logging in mojo:media app.

mojo/services/html_viewer/html_viewer.cc

 // Copyright 2014 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/logging.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread.h"
@@ skipping 152 matching lines @@
 #elif defined(OS_POSIX)
     command_line_args = app->args();
 #endif
 
     base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
     command_line->InitFromArgv(command_line_args);
 
     logging::LoggingSettings settings;
     settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;
     logging::InitLogging(settings);
+    // Display process ID, thread ID and timestamp in logs.
+    logging::SetLogItems(true, true, true, false);
 
     bool enable_mojo_media_renderer =
         command_line->HasSwitch(kEnableMojoMediaRenderer);
 
     compositor_thread_.Start();
     web_media_player_factory_.reset(new WebMediaPlayerFactory(
         compositor_thread_.message_loop_proxy(), enable_mojo_media_renderer));
   }
 
   bool ConfigureIncomingConnection(ApplicationConnection* connection) override {
@@ skipping 16 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(HTMLViewer);
 };
 
 }  // namespace html_viewer
 
 MojoResult MojoMain(MojoHandle shell_handle) {
   mojo::ApplicationRunnerChromium runner(new html_viewer::HTMLViewer);
   return runner.Run(shell_handle);
 }