Rename IPC Sender and Listener in ppapi, content/public, and content/renderer

content/public/common/child_process_host.h

Index: content/public/common/child_process_host.h
diff --git a/content/public/common/child_process_host.h b/content/public/common/child_process_host.h
index 499ac2e21d3e60cc1c7556abffb5f917749b35d0..f04bb0a696f6e22863b58c115cf57e42cb1cfdaa 100644
--- a/content/public/common/child_process_host.h
+++ b/content/public/common/child_process_host.h
@@ -19,7 +19,7 @@ class ChildProcessHostDelegate;
 // This represents a non-browser process. This can include traditional child
 // processes like plugins, or an embedder could even use this for long lived
 // processes that run independent of the browser process.
-class CONTENT_EXPORT ChildProcessHost : public IPC::Message::Sender {
+class CONTENT_EXPORT ChildProcessHost : public IPC::Sender {
  public:
   virtual ~ChildProcessHost() {}