Add command-line arguments to start_web_ui in Memory Inspector

This patch adds two optional arguments:
  -p PORT, --port PORT  the port on which the memory inspector server will run
  -n, --no-browser      do not open the memory inspector in a web browser

This change will make the start_web_ui file reusable for the Memory
Inspector Chrome App.

BUG=448399

Review URL: https://codereview.chromium.org/852013004

Cr-Commit-Position: refs/heads/master@{#312136}

1 files changed, 26 insertions, 5 deletions

diff --git a/tools/memory_inspector/start_web_ui b/tools/memory_inspector/start_web_ui
index 27a0e08..2c16b64 100755
--- a/tools/memory_inspector/start_web_ui
+++ b/tools/memory_inspector/start_web_ui
@@ -3,15 +3,36 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import argparse
 import logging
-import webbrowser
 
 from memory_inspector.frontends import www_server
 
 
+DEFAULT_HTTP_PORT = 8089
+
+
+def _ParseArguments():
+  parser = argparse.ArgumentParser(description='Start the memory inspector.')
+  parser.add_argument(
+      '-p', '--port',
+      type=int,
+      default=DEFAULT_HTTP_PORT,
+      help='the port on which the memory inspector server will run')
+  parser.add_argument(
+      '-n', '--no-browser',
+      action='store_true',
+      default=False,
+      help=('start the memory inspector server without launching the web-based '
+            'frontend'))
+  return parser.parse_args()
+
+
 if __name__ == '__main__':
-  HTTP_PORT=8089
+  options = _ParseArguments()
   logging.getLogger().setLevel(logging.WARNING)
-  print 'Serving on port %d' % HTTP_PORT
-  webbrowser.open('http://localhost:%d' % HTTP_PORT)
-  www_server.Start(HTTP_PORT)
\ No newline at end of file
+  print 'Serving on port %d' % options.port
+  if not options.no_browser:
+    import webbrowser
+    webbrowser.open('http://localhost:%d' % options.port)
+  www_server.Start(options.port)