Decouple IPC::MessageFilter from IPC::Channel

content/child/child_histogram_message_filter.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/child/child_histogram_message_filter.h"
 
 #include <ctype.h>
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram_delta_serialization.h"
 #include "content/child/child_process.h"
 #include "content/child/child_thread.h"
 #include "content/common/child_process_messages.h"
-#include "ipc/ipc_channel.h"
+#include "ipc/ipc_sender.h"
 
 namespace content {
 
 ChildHistogramMessageFilter::ChildHistogramMessageFilter()
-    : channel_(NULL),
+    : sender_(NULL),
       io_message_loop_(ChildProcess::current()->io_message_loop_proxy()) {
 }
 
 ChildHistogramMessageFilter::~ChildHistogramMessageFilter() {
 }
 
-void ChildHistogramMessageFilter::OnFilterAdded(IPC::Channel* channel) {
-  channel_ = channel;
+void ChildHistogramMessageFilter::OnFilterAdded(IPC::Sender* sender) {
+  sender_ = sender;
 }
 
 void ChildHistogramMessageFilter::OnFilterRemoved() {
 }
 
 bool ChildHistogramMessageFilter::OnMessageReceived(
     const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(ChildHistogramMessageFilter, message)
     IPC_MESSAGE_HANDLER(ChildProcessMsg_GetChildHistogramData,
@@ skipping 14 matching lines @@
 }
 
 void ChildHistogramMessageFilter::UploadAllHistograms(int sequence_number) {
   if (!histogram_delta_serialization_) {
     histogram_delta_serialization_.reset(
         new base::HistogramDeltaSerialization("ChildProcess"));
   }
 
   std::vector<std::string> deltas;
   histogram_delta_serialization_->PrepareAndSerializeDeltas(&deltas);
-  channel_->Send(
+  sender_->Send(
       new ChildProcessHostMsg_ChildHistogramData(sequence_number, deltas));
 
   static int count = 0;
   count++;
   DHISTOGRAM_COUNTS("Histogram.ChildProcessHistogramSentCount", count);
 }
 
 }  // namespace content