Use IPC::Sender and IPC::Listener in content.

content/common/resource_dispatcher_unittest.cc

Index: content/common/resource_dispatcher_unittest.cc
diff --git a/content/common/resource_dispatcher_unittest.cc b/content/common/resource_dispatcher_unittest.cc
index f66dc2e781844a88032d1dcfae458ad53a766d38..cf31c3c61bdd426ac23b4440c411a1f57e2a207d 100644
--- a/content/common/resource_dispatcher_unittest.cc
+++ b/content/common/resource_dispatcher_unittest.cc
@@ -90,10 +90,9 @@ class TestRequestCallback : public ResourceLoaderBridge::Peer {
 
 
 // Sets up the message sender override for the unit test
-class ResourceDispatcherTest : public testing::Test,
-                               public IPC::Message::Sender {
+class ResourceDispatcherTest : public testing::Test, public IPC::Sender {
  public:
-  // Emulates IPC send operations (IPC::Message::Sender) by adding
+  // Emulates IPC send operations (IPC::Sender) by adding
   // pending messages to the queue.
   virtual bool Send(IPC::Message* msg) {
     message_queue_.push_back(IPC::Message(*msg));