Revert "Always activate MojoApplicationHost"

content/browser/mojo/mojo_application_host.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/mojo/mojo_application_host.h"
 
 #include "content/common/mojo/mojo_messages.h"
 #include "content/public/browser/browser_thread.h"
 #include "ipc/ipc_sender.h"
 #include "mojo/embedder/platform_channel_pair.h"
@@ skipping 29 matching lines @@
   if (!message_pipe.is_valid())
     return false;
 
   // Forward this to the client once we know its process handle.
   client_handle_ = channel_pair.PassClientHandle();
 
   service_registry_.BindRemoteServiceProvider(message_pipe.Pass());
   return true;
 }
 
-void MojoApplicationHost::Activate(IPC::Sender* sender,
+bool MojoApplicationHost::Activate(IPC::Sender* sender,
                                    base::ProcessHandle process_handle) {
   DCHECK(!did_activate_);
   DCHECK(client_handle_.is_valid());
 
   base::PlatformFile client_file =
       PlatformFileFromScopedPlatformHandle(client_handle_.Pass());
   did_activate_ = sender->Send(new MojoMsg_Activate(
       IPC::GetFileHandleForProcess(client_file, process_handle, true)));
+  return did_activate_;
 }
 
 void MojoApplicationHost::WillDestroySoon() {
   channel_init_.WillDestroySoon();
 }
 
 }  // namespace content