Remove connect message from Native Messaging API

chrome/common/extensions/docs/examples/extensions/native_messaging/echo.py

Index: chrome/common/extensions/docs/examples/extensions/native_messaging/echo.py
diff --git a/chrome/common/extensions/docs/examples/extensions/native_messaging/echo.py b/chrome/common/extensions/docs/examples/extensions/native_messaging/echo.py
index ffb6cefeb94761b5560cb555c9f9a0ab9ad5954f..0034fa96b1755a0228f957eb20c5ad732a9035ae 100755
--- a/chrome/common/extensions/docs/examples/extensions/native_messaging/echo.py
+++ b/chrome/common/extensions/docs/examples/extensions/native_messaging/echo.py
@@ -9,23 +9,10 @@
 import sys
 import struct
 
-MESSAGE_TYPE_SEND_MESSAGE_REQUEST = 0
-MESSAGE_TYPE_SEND_MESSAGE_RESPONSE = 1
-MESSAGE_TYPE_CONNECT = 2
-MESSAGE_TYPE_CONNECT_MESSAGE = 3
-
 def Main():
   message_number = 0
 
   while 1:
-    # Read the message type (first 4 bytes).
-    type_bytes = sys.stdin.read(4)
-
-    if len(type_bytes) == 0:
-      break
-
-    message_type = struct.unpack('i', type_bytes)[0]
-
     # Read the message length (4 bytes).
     text_length = struct.unpack('i', sys.stdin.read(4))[0]
 
@@ -35,16 +22,10 @@ def Main():
     message_number += 1
 
     response = '{{"id": {0}, "echo": {1}}}'.format(message_number,
-                                                  text).encode('utf-8')
-
-    # Choose the correct message type for the response.
-    if message_type == MESSAGE_TYPE_SEND_MESSAGE_REQUEST:
-      response_type = MESSAGE_TYPE_SEND_MESSAGE_RESPONSE
-    else:
-      response_type = MESSAGE_TYPE_CONNECT_MESSAGE
+                                                   text).encode('utf-8')
 
     try:
-      sys.stdout.write(struct.pack("II", response_type, len(response)))
+      sys.stdout.write(struct.pack("I", len(response)))
       sys.stdout.write(response)
       sys.stdout.flush()
     except IOError: