Added connection timeout functionality to CastSocket.

chrome/common/extensions/api/cast_channel.idl

Index: chrome/common/extensions/api/cast_channel.idl
diff --git a/chrome/common/extensions/api/cast_channel.idl b/chrome/common/extensions/api/cast_channel.idl
index d034bf13790ecdd21526d68d184a7ad6ad5e58bf..0c745c754c4bc46fd77aa865f841608e82cab250 100644
--- a/chrome/common/extensions/api/cast_channel.idl
+++ b/chrome/common/extensions/api/cast_channel.idl
@@ -43,7 +43,9 @@ namespace cast.channel {
     // An invalid channel id was passed.
     invalid_channel_id,
     // Unspecified error.
-    unknown
+    unknown,
+    // The connection could not be established before timing out.
+    connect_timeout

[mark a. foltz, 2014/07/17 23:56:50]

Can we leave "unknown" as the last enum value?

[Kevin M, 2014/07/22 18:51:49]

Done. This a forward compatible change, right? Javascript understands enum
values by their identifiers, not ordinal values, right?

[mark a. foltz, 2014/07/22 18:57:53]

Enums are passed by string, e.g. 'connection_timeout', to/from the JS.

   };
 
   // Authentication methods that may be required to connect to a Cast receiver.
@@ -64,6 +66,11 @@ namespace cast.channel {
     // The port number to connect to, 0-65535.
     long port;
 
+    // The amount of time to wait in milliseconds before stopping the
+    // connection process. Timeouts are disabled if the value is zero.
+    // The default timeout is 5000ms/5 seconds.
+    long? timeout;

[mark a. foltz, 2014/07/17 23:56:50]

Maybe just 5000 ms.

[Kevin M, 2014/07/22 18:51:49]

OK. 8000ms to match cloudview.sender.ChannelService.CHANNEL_CREATION_TIMEOUT_ .

+
     // The authentication method required for the channel.
     ChannelAuthType auth;
   };