Fix urls under /sky to work again

Turns out that the /sky mapping to the gen
directory was interfering with our new pattern
of mapping the actual /sky directory.

So now we use a more restrictive mapping pattern
of only mapping /sky/services, similar for
/mojo/services and /mojo/public.

Fixed an exception of not finding _sky_server
when a custom sky_server was already running.

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/692163002

tools/sky_server

@@ -65,18 +65,17 @@ def main():
             'tools.staticdir.dir': os.path.abspath(args.app_path),
             'tools.staticdir.indexlister': skydir,
         },
-        '/mojo': {
+        '/mojo/public': {
             'tools.staticdir.on': True,
-            'tools.staticdir.dir': os.path.join(GEN_ROOT, 'mojo'),
+            'tools.staticdir.dir': os.path.join(GEN_ROOT, 'mojo', 'public'),
         },
-        '/sky': {
+        '/mojo/services': {
             'tools.staticdir.on': True,
-            'tools.staticdir.dir': os.path.join(GEN_ROOT, 'sky'),
+            'tools.staticdir.dir': os.path.join(GEN_ROOT, 'mojo', 'services'),
         },
-        '/sky/framework': {
+        '/sky/services': {
             'tools.staticdir.on': True,
-            'tools.staticdir.dir':
-                os.path.join(SKY_ROOT, 'framework'),
+            'tools.staticdir.dir': os.path.join(GEN_ROOT, 'sky', 'services'),
         },
      }
     cherrypy.quickstart(config=config)

tools/skydb

@@ -26,6 +26,9 @@ SUPPORTED_MIME_TYPES = [
 ]
 
 class SkyDebugger(object):
+    def __init__(self):
+        self._sky_server = None
+
     @staticmethod
     def _port_in_use(port):
         sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
@@ -46,7 +49,8 @@ class SkyDebugger(object):
 
         if self._port_in_use(HTTP_PORT):
             logging.warn(
-                'Port %s already in use, assuming custom sky_server started.')
+                'Port %s already in use, assuming custom sky_server started.' %
+                HTTP_PORT)
         else:
             server_command = [
                 os.path.join(SKY_TOOLS_DIRECTORY, 'sky_server'),