A change for the setPause() api in chrome.sockets.tcp:

extensions/browser/api/sockets_tcp/tcp_socket_event_dispatcher.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 "extensions/browser/api/sockets_tcp/tcp_socket_event_dispatcher.h"
 
 #include "base/lazy_instance.h"
 #include "extensions/browser/api/socket/tcp_socket.h"
 #include "extensions/browser/event_router.h"
 #include "extensions/browser/extension_system.h"
@@ skipping 97 matching lines @@
   socket->Read(buffer_size,
                base::Bind(&TCPSocketEventDispatcher::ReadCallback, params));
 }
 
 // static
 void TCPSocketEventDispatcher::ReadCallback(
     const ReadParams& params,
     int bytes_read,
     scoped_refptr<net::IOBuffer> io_buffer) {
   DCHECK_CURRENTLY_ON(params.thread_id);
+  ResumableTCPSocket* socket =
+      params.sockets->Get(params.extension_id, params.socket_id);
+  bool socket_paused = socket != NULL && socket->paused();
 
   // If |bytes_read| == 0, the connection has been closed by the peer.
   // If |bytes_read| < 0, there was a network error, and |bytes_read| is a value
   // from "net::ERR_".
 
   if (bytes_read == 0) {
     bytes_read = net::ERR_CONNECTION_CLOSED;
   }
 
   if (bytes_read > 0) {
@@ skipping 10 matching lines @@
 
     // Post a task to delay the read until the socket is available, as
     // calling StartReceive at this point would error with ERR_IO_PENDING.
     BrowserThread::PostTask(
         params.thread_id,
         FROM_HERE,
         base::Bind(&TCPSocketEventDispatcher::StartRead, params));
   } else if (bytes_read == net::ERR_IO_PENDING) {
     // This happens when resuming a socket which already had an
     // active "read" callback.
+  } else if (bytes_read == net::ERR_ABORTED && socket_paused) {
+    // This happens when a socket has been paused by the
+    // sockets_tcp.setPaused() API. The Read() was canceled on purpose. Let
+    // the socket know that the API-invoked pause process has completed. Do
+    // not dispatch an "onReceiveError" as there was no real error.
+    socket->ApiPauseComplete();
   } else {
     // Dispatch "onReceiveError" event but don't start another read to avoid
     // potential infinite reads if we have a persistent network error.
     sockets_tcp::ReceiveErrorInfo receive_error_info;
     receive_error_info.socket_id = params.socket_id;
     receive_error_info.result_code = bytes_read;
     scoped_ptr<base::ListValue> args =
         sockets_tcp::OnReceiveError::Create(receive_error_info);
     scoped_ptr<Event> event(new Event(events::SOCKETS_TCP_ON_RECEIVE_ERROR,
                                       sockets_tcp::OnReceiveError::kEventName,
                                       args.Pass()));
     PostEvent(params, event.Pass());
-
     // Since we got an error, the socket is now "paused" until the application
     // "resumes" it.
     ResumableTCPSocket* socket =
         params.sockets->Get(params.extension_id, params.socket_id);
     if (socket) {
       socket->set_paused(true);
     }
   }
 }
 
 // static
 void TCPSocketEventDispatcher::PostEvent(const ReadParams& params,
                                          scoped_ptr<Event> event) {
   DCHECK_CURRENTLY_ON(params.thread_id);
-
-  BrowserThread::PostTask(BrowserThread::UI,
-                          FROM_HERE,
-                          base::Bind(&DispatchEvent,
-                                     params.browser_context_id,
-                                     params.extension_id,
-                                     base::Passed(event.Pass())));
+  BrowserThread::PostTask(
+      BrowserThread::UI, FROM_HERE,
+      base::Bind(&DispatchEvent, params.browser_context_id, params.extension_id,
+                 base::Passed(event.Pass())));
 }
 
 // static
 void TCPSocketEventDispatcher::DispatchEvent(void* browser_context_id,
                                              const std::string& extension_id,
                                              scoped_ptr<Event> event) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   content::BrowserContext* context =
       reinterpret_cast<content::BrowserContext*>(browser_context_id);
-  if (!extensions::ExtensionsBrowserClient::Get()->IsValidContext(context))
+  if (!extensions::ExtensionsBrowserClient::Get()->IsValidContext(context)) {
     return;
+  }
 
   EventRouter* event_router = EventRouter::Get(context);
-  if (event_router)
+  if (event_router) {
     event_router->DispatchEventToExtension(extension_id, event.Pass());
+  }
 }
 
 }  // namespace api
 }  // namespace extensions