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

content/renderer/gpu/compositor_thread.h

Index: content/renderer/gpu/compositor_thread.h
diff --git a/content/renderer/gpu/compositor_thread.h b/content/renderer/gpu/compositor_thread.h
index aed3afd51249b1a02061e8d8d239d2f31b2640da..ed38a37240382a0f9b4539e7cd36d032c90db848 100644
--- a/content/renderer/gpu/compositor_thread.h
+++ b/content/renderer/gpu/compositor_thread.h
@@ -26,7 +26,7 @@ class CompositorThread {
  public:
   // |main_listener| refers to the central IPC message listener that lives on
   // the main thread, where all incoming IPC messages are first handled.
-  explicit CompositorThread(IPC::Channel::Listener* main_listener);
+  explicit CompositorThread(IPC::Listener* main_listener);
   ~CompositorThread();
 
   // This MessageFilter should be added to allow input events to be redirected