Add a flag to dump IPC messages sent from the renderer to the browser.

ipc/ipc_channel_proxy.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 "ipc/ipc_channel_proxy.h"
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/location.h"
 #include "base/memory/ref_counted.h"
@@ skipping 317 matching lines @@
 scoped_ptr<ChannelProxy> ChannelProxy::Create(
     scoped_ptr<ChannelFactory> factory,
     Listener* listener,
     const scoped_refptr<base::SingleThreadTaskRunner>& ipc_task_runner) {
   scoped_ptr<ChannelProxy> channel(new ChannelProxy(listener, ipc_task_runner));
   channel->Init(factory.Pass(), true);
   return channel.Pass();
 }
 
 ChannelProxy::ChannelProxy(Context* context)
-    : context_(context),
-      did_init_(false) {
+    : context_(context), did_init_(false), outgoing_message_filter_(NULL) {

[inferno, 2015/03/05 18:46:48]

each var on its own line.

[inferno, 2015/03/05 18:46:48]

why not put this var inside ifdef, regular builds don't need this.

 }
 
 ChannelProxy::ChannelProxy(
     Listener* listener,
     const scoped_refptr<base::SingleThreadTaskRunner>& ipc_task_runner)
-    : context_(new Context(listener, ipc_task_runner)), did_init_(false) {
+    : context_(new Context(listener, ipc_task_runner)),
+      did_init_(false),
+      outgoing_message_filter_(NULL) {
 }
 
 ChannelProxy::~ChannelProxy() {
   DCHECK(CalledOnValidThread());
 
   Close();
 }
 
 void ChannelProxy::Init(const IPC::ChannelHandle& channel_handle,
                         Channel::Mode mode,
@@ skipping 48 matching lines @@
         FROM_HERE, base::Bind(&Context::OnChannelClosed, context_.get()));
   }
 }
 
 bool ChannelProxy::Send(Message* message) {
   DCHECK(did_init_);
 
   // TODO(alexeypa): add DCHECK(CalledOnValidThread()) here. Currently there are
   // tests that call Send() from a wrong thread. See http://crbug.com/163523.
 
+  if (outgoing_message_filter())

[inferno, 2015/03/05 18:46:47]

Please add a comment explaining what its purpose is. also, this code behind
ifdef.

+    message = outgoing_message_filter()->Rewrite(message);
+
 #ifdef IPC_MESSAGE_LOG_ENABLED
   Logging::GetInstance()->OnSendMessage(message, context_->channel_id());
 #endif
 
   context_->ipc_task_runner()->PostTask(
       FROM_HERE,
       base::Bind(&ChannelProxy::Context::OnSendMessage,
                  context_, base::Passed(scoped_ptr<Message>(message))));
   return true;
 }
@@ skipping 43 matching lines @@
   Channel* channel = context_.get()->channel_.get();
   // Channel must have been created first.
   DCHECK(channel) << context_.get()->channel_id_;
   return channel->TakeClientFileDescriptor();
 }
 #endif
 
 //-----------------------------------------------------------------------------
 
 }  // namespace IPC