More polish in prep for CrOS support

tools/chrome_remote_control/chrome_remote_control/temporary_http_server.py

Index: tools/chrome_remote_control/chrome_remote_control/temporary_http_server.py
diff --git a/tools/chrome_remote_control/chrome_remote_control/temporary_http_server.py b/tools/chrome_remote_control/chrome_remote_control/temporary_http_server.py
new file mode 100644
index 0000000000000000000000000000000000000000..9a6b069be8a126d3f828f4039a95a9787e46ba73
--- /dev/null
+++ b/tools/chrome_remote_control/chrome_remote_control/temporary_http_server.py
@@ -0,0 +1,74 @@
+# Copyright (c) 2012 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.
+import os
+import socket
+import subprocess
+import sys
+import urllib2
+import urlparse
+
+import util
+
+class TemporaryHTTPServer(object):
+  def __init__(self, browser_backend, path):
+    self._server = None
+    self._devnull = None
+    self._path = path
+    self._forwarder = None
+
+    tmp = socket.socket()
+    tmp.bind(('', 0))
+    port = tmp.getsockname()[1]
+    tmp.close()
+    self._host_port = port
+
+    assert os.path.exists(path)
+    assert os.path.isdir(path)
+
+    self._devnull = open(os.devnull, 'w')
+    self._server = subprocess.Popen(
+        [sys.executable, '-m', 'SimpleHTTPServer', str(self._host_port)],
+        cwd=self._path,
+        stdout=self._devnull, stderr=self._devnull)
+
+    self._forwarder = browser_backend.CreateForwarder(self._host_port)
+
+  def __enter__(self):
+    return self
+
+  def __exit__(self, *args):
+    self.Close()
+
+  def __del__(self):
+    self.Close()
+
+  def Close(self):
+    if self._forwarder:
+      self._forwarder.Close()
+      self._forwarder = None
+    if self._server:
+      self._server.kill()
+      self._server = None
+    if self._devnull:
+      self._devnull.close()
+      self._devnull = None
+
+  @property
+  def url(self):
+    return self._forwarder.url
+
+
+  def UrlOf(self, path):
+    return urlparse.urljoin(self.url, path)
+
+
+class NullBackend(object):
+  def testBasic(self):
+    options = browser_options.options_for_unittests
+    options.browser_to_use = browser_finder.ALL_BROWSER_TYPES
+    browser_to_create = browser_finder.FindBrowser(options)
+    if not browser_to_create:
+      raise Exception('No browser found, cannot continue test.')
+    with browser_to_create.Create() as b:
+      self.assertEquals(1, b.num_tabs)