Revert 262175 "* Replace "read" method with onReceiveXxx events."

trunk/src/chrome/browser/extensions/api/bluetooth/bluetooth_socket_event_dispatcher.cc

Index: trunk/src/chrome/browser/extensions/api/bluetooth/bluetooth_socket_event_dispatcher.cc
===================================================================
--- trunk/src/chrome/browser/extensions/api/bluetooth/bluetooth_socket_event_dispatcher.cc	(revision 262179)
+++ trunk/src/chrome/browser/extensions/api/bluetooth/bluetooth_socket_event_dispatcher.cc	(working copy)
@@ -1,179 +0,0 @@
-// 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 "chrome/browser/extensions/api/bluetooth/bluetooth_socket_event_dispatcher.h"
-
-#include "chrome/browser/browser_process.h"
-#include "chrome/browser/extensions/api/bluetooth/bluetooth_api_socket.h"
-#include "chrome/common/extensions/api/bluetooth.h"
-#include "extensions/browser/event_router.h"
-#include "extensions/browser/extension_system.h"
-#include "net/base/io_buffer.h"
-#include "net/base/net_errors.h"
-
-namespace {
-
-namespace bluetooth = extensions::api::bluetooth;
-using extensions::BluetoothApiSocket;
-
-int kDefaultBufferSize = 4096;
-
-bluetooth::ReceiveError MapErrorReason(BluetoothApiSocket::ErrorReason value) {
-  switch (value) {
-    case BluetoothApiSocket::kDisconnected:
-      return bluetooth::RECEIVE_ERROR_DISCONNECTED;
-    case BluetoothApiSocket::kIOPending:
-    // kIOPending is not relevant to apps, as BluetoothSocketEventDispatcher
-    // handles this specific error.
-    // fallthrough
-    default:
-      return bluetooth::RECEIVE_ERROR_SYSTEM_ERROR;
-  }
-}
-
-}  // namespace
-
-namespace extensions {
-namespace api {
-
-using content::BrowserThread;
-
-BluetoothSocketEventDispatcher::BluetoothSocketEventDispatcher(
-    content::BrowserContext* context,
-    scoped_refptr<SocketData> socket_data)
-    : thread_id_(BluetoothApiSocket::kThreadId),
-      browser_context_id_(context),
-      socket_data_(socket_data) {}
-
-BluetoothSocketEventDispatcher::~BluetoothSocketEventDispatcher() {}
-
-BluetoothSocketEventDispatcher::ReceiveParams::ReceiveParams() {}
-
-BluetoothSocketEventDispatcher::ReceiveParams::~ReceiveParams() {}
-
-void BluetoothSocketEventDispatcher::OnSocketResume(
-    const std::string& extension_id,
-    int socket_id) {
-  DCHECK(BrowserThread::CurrentlyOn(thread_id_));
-
-  ReceiveParams params;
-  params.extension_id = extension_id;
-  params.socket_id = socket_id;
-  StartReceive(params);
-}
-
-void BluetoothSocketEventDispatcher::StartReceive(const ReceiveParams& params) {
-  DCHECK(BrowserThread::CurrentlyOn(thread_id_));
-
-  BluetoothApiSocket* socket =
-      socket_data_->Get(params.extension_id, params.socket_id);
-  if (!socket) {
-    // This can happen if the socket is closed while our callback is active.
-    return;
-  }
-  DCHECK(params.extension_id == socket->owner_extension_id())
-      << "Socket has wrong owner.";
-
-  // Don't start another read if the socket has been paused.
-  if (socket->paused())
-    return;
-
-  int buffer_size = socket->buffer_size();
-  if (buffer_size <= 0)
-    buffer_size = kDefaultBufferSize;
-  socket->Receive(
-      buffer_size,
-      base::Bind(
-          &BluetoothSocketEventDispatcher::ReceiveCallback, this, params),
-      base::Bind(
-          &BluetoothSocketEventDispatcher::ReceiveErrorCallback, this, params));
-}
-
-void BluetoothSocketEventDispatcher::ReceiveCallback(
-    const ReceiveParams& params,
-    int bytes_read,
-    scoped_refptr<net::IOBuffer> io_buffer) {
-  DCHECK(BrowserThread::CurrentlyOn(thread_id_));
-
-  // Dispatch "onReceive" event.
-  bluetooth::ReceiveInfo receive_info;
-  receive_info.socket_id = params.socket_id;
-  receive_info.data = std::string(io_buffer->data(), bytes_read);
-  scoped_ptr<base::ListValue> args = bluetooth::OnReceive::Create(receive_info);
-  scoped_ptr<Event> event(
-      new Event(bluetooth::OnReceive::kEventName, args.Pass()));
-  PostEvent(params, event.Pass());
-
-  // 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(
-      thread_id_,
-      FROM_HERE,
-      base::Bind(&BluetoothSocketEventDispatcher::StartReceive, this, params));
-}
-
-void BluetoothSocketEventDispatcher::ReceiveErrorCallback(
-    const ReceiveParams& params,
-    BluetoothApiSocket::ErrorReason error_reason,
-    const std::string& error) {
-  DCHECK(BrowserThread::CurrentlyOn(thread_id_));
-
-  if (error_reason == BluetoothApiSocket::kIOPending) {
-    // This happens when resuming a socket which already had an active "read"
-    // callback. We can safely ignore this error, as the application should not
-    // care.
-    return;
-  }
-
-  // Dispatch "onReceiveError" event but don't start another read to avoid
-  // potential infinite reads if we have a persistent network error.
-  bluetooth::ReceiveErrorInfo receive_error_info;
-  receive_error_info.socket_id = params.socket_id;
-  receive_error_info.error_message = error;
-  receive_error_info.error = MapErrorReason(error_reason);
-  scoped_ptr<base::ListValue> args =
-      bluetooth::OnReceiveError::Create(receive_error_info);
-  scoped_ptr<Event> event(
-      new Event(bluetooth::OnReceiveError::kEventName, args.Pass()));
-  PostEvent(params, event.Pass());
-
-  // Since we got an error, the socket is now "paused" until the application
-  // "resumes" it.
-  BluetoothApiSocket* socket =
-      socket_data_->Get(params.extension_id, params.socket_id);
-  if (socket) {
-    socket->set_paused(true);
-  }
-}
-
-void BluetoothSocketEventDispatcher::PostEvent(const ReceiveParams& params,
-                                               scoped_ptr<Event> event) {
-  DCHECK(BrowserThread::CurrentlyOn(thread_id_));
-
-  BrowserThread::PostTask(
-      BrowserThread::UI,
-      FROM_HERE,
-      base::Bind(&BluetoothSocketEventDispatcher::DispatchEvent,
-                 this,
-                 params.extension_id,
-                 base::Passed(event.Pass())));
-}
-
-void BluetoothSocketEventDispatcher::DispatchEvent(
-    const std::string& extension_id,
-    scoped_ptr<Event> event) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  content::BrowserContext* context =
-      reinterpret_cast<content::BrowserContext*>(browser_context_id_);
-  if (!extensions::ExtensionsBrowserClient::Get()->IsValidContext(context))
-    return;
-
-  EventRouter* router = ExtensionSystem::Get(context)->event_router();
-  if (router)
-    router->DispatchEventToExtension(extension_id, event.Pass());
-}
-
-}  // namespace api
-}  // namespace extensions