Introduce IPC::Channel::Create*() to ensure it being heap-allocated.

ipc/ipc_perftests.cc

Index: ipc/ipc_perftests.cc
diff --git a/ipc/ipc_perftests.cc b/ipc/ipc_perftests.cc
index d4b1abdbc7e53b94fa3dcc72721e776cbf42d81b..3feabda9d106382a2774714a49c492ce7d54c8a3 100644
--- a/ipc/ipc_perftests.cc
+++ b/ipc/ipc_perftests.cc
@@ -265,11 +265,10 @@ TEST_F(IPCChannelPerfTest, Performance) {
 MULTIPROCESS_IPC_TEST_CLIENT_MAIN(PerformanceClient) {
   base::MessageLoopForIO main_message_loop;
   ChannelReflectorListener listener;
-  IPC::Channel channel(IPCTestBase::GetChannelName("PerformanceClient"),
-                       IPC::Channel::MODE_CLIENT,
-                       &listener);
-  listener.Init(&channel);
-  CHECK(channel.Connect());
+  scoped_ptr<IPC::Channel> channel(IPC::Channel::CreateClient(
+      IPCTestBase::GetChannelName("PerformanceClient"), &listener));
+  listener.Init(channel.get());
+  CHECK(channel->Connect());
 
   base::MessageLoop::current()->Run();
   return 0;