Improve multi-process debugging.

mojo/shell/switches.cc

 // Copyright 2013 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.
 
 #include "mojo/shell/switches.h"
 
 #include "base/basictypes.h"
 
 namespace switches {
 
+// Used just for debugging to make it easier to attach debuggers. The actual app
+// path that is used is sent over IPC.
+const char kApp[] = "app";
+
 // Used internally by the main process to indicate that a new process should be
 // a child process. Not for user use.
 const char kChildProcess[] = "child-process";
 
 // Comma separated list like:
 // text/html,mojo:html_viewer,application/bravo,https://abarth.com/bravo
 const char kContentHandlers[] = "content-handlers";
 
 // Force dynamically loaded apps / services to be loaded irrespective of cache
 // instructions.
@@ skipping 34 matching lines @@
 // seconds or when the shell exits.
 const char kTraceStartup[] = "trace-startup";
 
 // Specifies a set of mappings to apply when resolving urls. The value is a set
 // of ',' separated mappings, where each mapping consists of a pair of urls
 // giving the to/from url to map. For example, 'a=b,c=d' contains two mappings,
 // the first maps 'a' to 'b' and the second 'c' to 'd'.
 const char kURLMappings[] = "url-mappings";
 
 }  // namespace switches