Emit error if unknown switch is passed to mojo_shell

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 {
 
 // Specify configuration arguments for a Mojo application URL. For example:
 // --args-for='mojo:wget http://www.google.com'
 const char kArgsFor[] = "args-for";
 
 // Used to specify the type of child process (switch values from
 // |ChildProcess::Type|).
 const char kChildProcessType[] = "child-process-type";
 
@@ skipping 25 matching lines @@
 // Enables the mojo spy, which acts as a man-in-the-middle inspector for
 // message pipes and other activities. This is work in progress.
 const char kSpy[] = "spy";
 
 // Specifies a set of mappings to apply when resolving urls. The value is 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";
 
+const char* kSwitchArray[] = {
+  kArgsFor,
+  kChildProcessType,
+  kContentHandlers,
+  kDisableCache,
+  kEnableExternalApplications,
+  kEnableMultiprocess,
+  kHelp,
+  kOrigin,
+  kSpy,
+  kURLMappings
+};
+
+const std::set<std::string> GetAllSwitches() {
+  std::set<std::string> switch_set;
+
+  for (size_t i = 0; i < arraysize(kSwitchArray); ++i)
+    switch_set.insert(kSwitchArray[i]);
+  return switch_set;
+}
+
 }  // namespace switches