Revert "Remove kLogPluginMessages flag as part of flag cleanup."

content/plugin/plugin_channel.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 "content/plugin/plugin_channel.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/process/process_handle.h"
 #include "base/strings/string_util.h"
@@ skipping 227 matching lines @@
   return true;
 }
 
 PluginChannel::PluginChannel()
     : renderer_id_(-1),
       in_send_(0),
       incognito_(false),
       filter_(new MessageFilter()),
       npp_(new struct _NPP) {
   set_send_unblocking_only_during_unblock_dispatch();
+  const CommandLine* command_line = CommandLine::ForCurrentProcess();
+  log_messages_ = command_line->HasSwitch(switches::kLogPluginMessages);
 
   // Register |npp_| as the default owner for any object we receive via IPC,
   // and register it with WebBindings as a valid owner.
   SetDefaultNPObjectOwner(npp_.get());
   WebBindings::registerObjectOwner(npp_.get());
 }
 
 bool PluginChannel::OnControlMessageReceived(const IPC::Message& msg) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(PluginChannel, msg)
@@ skipping 79 matching lines @@
 void PluginChannel::OnDidAbortLoading(int render_view_id) {
   for (size_t i = 0; i < plugin_stubs_.size(); ++i) {
     if (plugin_stubs_[i]->webplugin()->host_render_view_routing_id() ==
             render_view_id) {
       plugin_stubs_[i]->delegate()->instance()->CloseStreams();
     }
   }
 }
 
 }  // namespace content