Implement `gn analyze`.

tools/gn/commands.cc

 // Copyright (c) 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 "tools/gn/commands.h"
 
 #include "base/command_line.h"
 #include "base/strings/string_split.h"
 #include "base/values.h"
 #include "tools/gn/builder.h"
@@ skipping 342 matching lines @@
 }
 
 const CommandInfoMap& GetCommands() {
   static CommandInfoMap info_map;
   if (info_map.empty()) {
     #define INSERT_COMMAND(cmd) \
         info_map[k##cmd] = CommandInfo(k##cmd##_HelpShort, \
                                        k##cmd##_Help, \
                                        &Run##cmd);
 
+    INSERT_COMMAND(Analyze)
     INSERT_COMMAND(Args)
     INSERT_COMMAND(Check)
     INSERT_COMMAND(Clean)
     INSERT_COMMAND(Desc)
     INSERT_COMMAND(Gen)
     INSERT_COMMAND(Format)
     INSERT_COMMAND(Help)
     INSERT_COMMAND(Ls)
     INSERT_COMMAND(Path)
     INSERT_COMMAND(Refs)
@@ skipping 155 matching lines @@
   FilterAndPrintTargets(indent, &target_vector);
 }
 
 void FilterAndPrintTargetSet(const std::set<const Target*>& targets,
                              base::ListValue* out) {
   std::vector<const Target*> target_vector(targets.begin(), targets.end());
   FilterAndPrintTargets(&target_vector, out);
 }
 
 }  // namespace commands