Revert 276939 "Decouple IPC::MessageFilter from IPC::Channel"

content/common/font_cache_dispatcher_win.h

Index: content/common/font_cache_dispatcher_win.h
===================================================================
--- content/common/font_cache_dispatcher_win.h	(revision 278168)
+++ content/common/font_cache_dispatcher_win.h	(working copy)
@@ -12,6 +12,10 @@
 #include "ipc/ipc_sender.h"
 #include "ipc/message_filter.h"
 
+namespace IPC {
+class Channel;
+}
+
 namespace content {
 
 // Dispatches messages used for font caching on Windows. This is needed because
@@ -27,7 +31,7 @@
 
  private:
   // IPC::MessageFilter implementation:
-  virtual void OnFilterAdded(IPC::Sender* sender) OVERRIDE;
+  virtual void OnFilterAdded(IPC::Channel* channel) OVERRIDE;
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
   virtual void OnChannelClosing() OVERRIDE;
 
@@ -35,7 +39,7 @@
   void OnPreCacheFont(const LOGFONT& font);
   void OnReleaseCachedFonts();
 
-  IPC::Sender* sender_;
+  IPC::Channel* channel_;
 
   DISALLOW_COPY_AND_ASSIGN(FontCacheDispatcher);
 };