Teach skydb about --release and --debug

Previously, skydb could be used only for Debug builds. As part of working on
graphics performance, I'd like to use it for release builds as well. This CL
teaches it to use the same configuration arguments as sky_server, test_sky, and
test_perf.

The downside of this CL is that you'll need to supply --debug in the common
case of working with a debug build.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/746473003

engine/src/flutter/tools/skydb

@@ -7,6 +7,7 @@ import argparse
 import logging
 import os
 from skypy.paths import Paths
+import skypy.configuration as configuration
 import socket;
 import subprocess
 import sys
@@ -23,14 +24,14 @@ SUPPORTED_MIME_TYPES = [
 class SkyDebugger(object):
     def __init__(self):
         self._sky_server = None
-        self.paths = Paths(os.path.join('out', 'Debug'))
+        self.paths = None
 
     @staticmethod
     def _port_in_use(port):
         sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
         return sock.connect_ex(('localhost', port)) == 0
 
-    def _start_http_server_for_file(self, path):
+    def _start_http_server_for_file(self, path, configuration):
         HTTP_PORT = 9999
 
 
@@ -51,7 +52,7 @@ class SkyDebugger(object):
         else:
             server_command = [
                 os.path.join(self.paths.sky_tools_directory, 'sky_server'),
-                '--debug',
+                '-t', configuration,
                 server_root,
                 str(HTTP_PORT),
             ]
@@ -69,8 +70,11 @@ class SkyDebugger(object):
         parser.add_argument('--use-osmesa', action='store_true',
             default=self._in_chromoting())
         parser.add_argument('url', nargs='?', type=str)
+        configuration.add_arguments(parser)
         args = parser.parse_args()
 
+        self.paths = Paths(os.path.join('out', args.configuration))
+
         content_handlers = ['%s,%s' % (mime_type, 'mojo:sky_viewer')
             for mime_type in SUPPORTED_MIME_TYPES]
         shell_command = [
@@ -83,7 +87,7 @@ class SkyDebugger(object):
         if args.url:
             url = args.url
             if not urlparse.urlparse(url).scheme:
-                url = self._start_http_server_for_file(url)
+                url = self._start_http_server_for_file(url, args.configuration)
 
             prompt_args = '--args-for=mojo:sky_debugger_prompt %s' % url
             shell_command.append(prompt_args)