Initial checkin for devtools-based automation

tools/devtools_auto/third_party/websocket-client/examples/echoapp_client.py

+import websocket
+import thread
+import time
+import sys
+
+def on_message(ws, message):
+    print message
+
+def on_error(ws, error):
+    print error
+
+def on_close(ws):
+    print "### closed ###"
+
+def on_open(ws):
+    def run(*args):
+        for i in range(3):
+            # send the message, then wait 
+            # so thread doesnt exit and socket
+            # isnt closed
+            ws.send("Hello %d" % i)
+            time.sleep(1)
+        
+        time.sleep(1)
+        ws.close()
+        print "Thread terminating..."
+    
+    thread.start_new_thread(run, ())
+
+if __name__ == "__main__":
+    websocket.enableTrace(True)
+    if len(sys.argv) < 2:
+        host = "ws://echo.websocket.org/"
+    else:
+        host = sys.argv[1]
+    ws = websocket.WebSocketApp(host,
+                                on_message = on_message,
+                                on_error = on_error,
+                                on_close = on_close)
+    ws.on_open = on_open
+    ws.run_forever()