Rename IPC::Channel and IPC::Sender in src/chrome.

chrome/renderer/pepper/ppb_nacl_private_impl.cc

Index: chrome/renderer/pepper/ppb_nacl_private_impl.cc
diff --git a/chrome/renderer/pepper/ppb_nacl_private_impl.cc b/chrome/renderer/pepper/ppb_nacl_private_impl.cc
index 61fa839e4f9dea16f6df96e46ecdf71fbc658b65..b64606594702ea0baf7d5f900d4333fc77c34ceb 100644
--- a/chrome/renderer/pepper/ppb_nacl_private_impl.cc
+++ b/chrome/renderer/pepper/ppb_nacl_private_impl.cc
@@ -31,7 +31,7 @@ PP_Bool LaunchSelLdr(PP_Instance instance,
                      const char* alleged_url, int socket_count,
                      void* imc_handles) {
   std::vector<nacl::FileDescriptor> sockets;
-  IPC::Message::Sender* sender = content::RenderThread::Get();
+  IPC::Sender* sender = content::RenderThread::Get();
   if (sender == NULL)
     sender = g_background_thread_sender.Pointer()->get();