Remove weak pointers from CastSocket.

extensions/browser/api/cast_channel/cast_channel_api.cc

Index: extensions/browser/api/cast_channel/cast_channel_api.cc
diff --git a/extensions/browser/api/cast_channel/cast_channel_api.cc b/extensions/browser/api/cast_channel/cast_channel_api.cc
index 8878a0c5c26fd3a439aad1ab2d5531530902e3c2..bf710534488da7b44e696a6f3529b2bdff86e9fd 100644
--- a/extensions/browser/api/cast_channel/cast_channel_api.cc
+++ b/extensions/browser/api/cast_channel/cast_channel_api.cc
@@ -65,7 +65,7 @@ void FillChannelInfo(const CastSocket& socket, ChannelInfo* channel_info) {
 
 bool IsValidConnectInfoPort(const ConnectInfo& connect_info) {
   return connect_info.port > 0 && connect_info.port <
-    std::numeric_limits<unsigned short>::max();
+    std::numeric_limits<uint16_t>::max();
 }
 
 bool IsValidConnectInfoAuth(const ConnectInfo& connect_info) {
@@ -162,7 +162,8 @@ CastSocket* CastChannelAsyncApiFunction::GetSocketOrCompleteWithError(
     int channel_id) {
   CastSocket* socket = GetSocket(channel_id);
   if (!socket) {
-    SetResultFromError(cast_channel::CHANNEL_ERROR_INVALID_CHANNEL_ID);
+    SetResultFromError(channel_id,
+                       cast_channel::CHANNEL_ERROR_INVALID_CHANNEL_ID);
     AsyncWorkCompleted();
   }
   return socket;
@@ -183,21 +184,24 @@ void CastChannelAsyncApiFunction::RemoveSocket(int channel_id) {
   manager_->Remove(extension_->id(), channel_id);
 }
 
-void CastChannelAsyncApiFunction::SetResultFromSocket(int channel_id) {
-  CastSocket* socket = GetSocket(channel_id);
-  DCHECK(socket);
+void CastChannelAsyncApiFunction::SetResultFromSocket(
+    const CastSocket& socket) {
   ChannelInfo channel_info;
-  FillChannelInfo(*socket, &channel_info);
-  error_ = socket->error_state();
+  FillChannelInfo(socket, &channel_info);
+  error_ = socket.error_state();
   SetResultFromChannelInfo(channel_info);
 }
 
-void CastChannelAsyncApiFunction::SetResultFromError(ChannelError error) {
+void CastChannelAsyncApiFunction::SetResultFromError(int channel_id,
+                                                     ChannelError error) {
   ChannelInfo channel_info;
-  channel_info.channel_id = -1;
+  channel_info.channel_id = channel_id;
   channel_info.url = "";
   channel_info.ready_state = cast_channel::READY_STATE_CLOSED;
   channel_info.error_state = error;
+  channel_info.connect_info.ip_address = "";
+  channel_info.connect_info.port = 0;
+  channel_info.connect_info.auth = cast_channel::CHANNEL_AUTH_TYPE_SSL;
   SetResultFromChannelInfo(channel_info);
   error_ = error;
 }
@@ -338,7 +342,13 @@ void CastChannelOpenFunction::AsyncWorkStart() {
 void CastChannelOpenFunction::OnOpen(int result) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   VLOG(1) << "Connect finished, OnOpen invoked.";
-  SetResultFromSocket(new_channel_id_);
+  CastSocket* socket = GetSocket(new_channel_id_);
+  if (!socket) {
+    SetResultFromError(new_channel_id_,
+                       cast_channel::CHANNEL_ERROR_CONNECT_ERROR);
+  } else {
+    SetResultFromSocket(*socket);
+  }
   AsyncWorkCompleted();
 }
 
@@ -382,10 +392,13 @@ void CastChannelSendFunction::AsyncWorkStart() {
 
 void CastChannelSendFunction::OnSend(int result) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
-  if (result < 0) {
-    SetResultFromError(cast_channel::CHANNEL_ERROR_SOCKET_ERROR);
+  int channel_id = params_->channel.channel_id;
+  CastSocket* socket = GetSocket(channel_id);
+  if (result < 0 || !socket) {
+    SetResultFromError(channel_id,
+                       cast_channel::CHANNEL_ERROR_SOCKET_ERROR);
   } else {
-    SetResultFromSocket(params_->channel.channel_id);
+    SetResultFromSocket(*socket);
   }
   AsyncWorkCompleted();
 }
@@ -410,12 +423,16 @@ void CastChannelCloseFunction::AsyncWorkStart() {
 void CastChannelCloseFunction::OnClose(int result) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   VLOG(1) << "CastChannelCloseFunction::OnClose result = " << result;
-  if (result < 0) {
-    SetResultFromError(cast_channel::CHANNEL_ERROR_SOCKET_ERROR);
+  int channel_id = params_->channel.channel_id;
+  CastSocket* socket = GetSocket(channel_id);
+  if (result < 0 || !socket) {
+    SetResultFromError(channel_id,
+                       cast_channel::CHANNEL_ERROR_SOCKET_ERROR);
   } else {
-    int channel_id = params_->channel.channel_id;
-    SetResultFromSocket(channel_id);
+    SetResultFromSocket(*socket);
+    // This will delete |socket|.
     RemoveSocket(channel_id);
+    socket = NULL;
   }
   AsyncWorkCompleted();
 }