[GN] Add support for generating Xcode projects.

tools/gn/variables.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/variables.h"
 
 namespace variables {
 
 // Built-in variables ----------------------------------------------------------
 
@@ skipping 1308 matching lines @@
 const char kPrecompiledSource[] = "precompiled_source";
 const char kPrecompiledSource_HelpShort[] =
     "precompiled_source: [file name] Source file to precompile.";
 const char kPrecompiledSource_Help[] =
     "precompiled_source: [file name] Source file to precompile.\n"
     "\n"
     "  The source file that goes along with the precompiled_header when\n"
     "  using \"msvc\"-style precompiled headers. It will be implicitly added\n"
     "  to the sources of the target. See \"gn help precompiled_header\".\n";
 
+const char kProductType[] = "product_type";
+const char kProductType_HelpShort[] =
+    "product_type: [string] Product type for Xcode projects.";
+const char kProductType_Help[] =
+    "product_type: Product type for Xcode projects.\n"
+    "\n"
+    "  Correspond to the type of the product of a create_bundle target. Only\n"
+    "  meaningful to Xcode (used as part of the Xcode project generation).\n"
+    "\n"
+    "  When generating Xcode project files, only create_bundle target with\n"
+    "  a non-empty product_type will have a corresponding target in Xcode\n"
+    "  project.\n";
+
 const char kPublic[] = "public";
 const char kPublic_HelpShort[] =
     "public: [file list] Declare public header files for a target.";
 const char kPublic_Help[] =
     "public: Declare public header files for a target.\n"
     "\n"
     "  A list of files that other targets can include. These permissions are\n"
     "  checked via the \"check\" command (see \"gn help check\").\n"
     "\n"
     "  If no public files are declared, other targets (assuming they have\n"
@@ skipping 352 matching lines @@
     INSERT_VARIABLE(Ldflags)
     INSERT_VARIABLE(Libs)
     INSERT_VARIABLE(LibDirs)
     INSERT_VARIABLE(OutputDir)
     INSERT_VARIABLE(OutputExtension)
     INSERT_VARIABLE(OutputName)
     INSERT_VARIABLE(OutputPrefixOverride)
     INSERT_VARIABLE(Outputs)
     INSERT_VARIABLE(PrecompiledHeader)
     INSERT_VARIABLE(PrecompiledSource)
+    INSERT_VARIABLE(ProductType)
     INSERT_VARIABLE(Public)
     INSERT_VARIABLE(PublicConfigs)
     INSERT_VARIABLE(PublicDeps)
     INSERT_VARIABLE(ResponseFileContents)
     INSERT_VARIABLE(Script)
     INSERT_VARIABLE(Sources)
     INSERT_VARIABLE(Testonly)
     INSERT_VARIABLE(Visibility)
     INSERT_VARIABLE(WriteRuntimeDeps)
   }
   return info_map;
 }
 
 #undef INSERT_VARIABLE
 
 }  // namespace variables