Add components and CLD to GN build.

third_party/cld_2/cld_2.gyp

 # 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.
 
 # Note to maintainers: In the January 2014 release (*_0122*), there are some
 # options for building:
 # Pick one quadgram file (cld2_generated_quadchrome*.cc):
 #   0122_16 = 160K entries, smallest size, lowest accuracy (set cld2_table_size=0)
 #   0122_19 = 192K entries, medium size, medium accuracy (set cld2_table_size=1)
 #   0122_2  = 256K entries, largest size, highest accuracy (set cld2_table_size=2)
 #
 # For the CJK bigram file (cld_generated_cjk_delta_bi*.cc), always use
 # cld_generated_cjk_delta_bi_4.cc, as this is intended for use with Chromium.
 # The _32 variant of the file is intended for applications that use the full
 # 175-language version of CLD2.
 
 {
   'targets': [
     {
+      # GN version: //third_party/cld_2:cld_2_dynamic_data_tool
       'target_name': 'cld_2_dynamic_data_tool',
       'type': 'executable',
       'include_dirs': [
         'src/internal',
         'src/public',
       ],
       'sources': [
+        # Note: sources list duplicated in GN build.
         'src/internal/cld2_dynamic_data.h',
         'src/internal/cld2_dynamic_data.cc',
         'src/internal/cld2_dynamic_data_extractor.h',
         'src/internal/cld2_dynamic_data_extractor.cc',
         'src/internal/cld2_dynamic_data_loader.h',
         'src/internal/cld2_dynamic_data_loader.cc',
         'src/internal/cld2_dynamic_data_tool.cc',
         'src/internal/cld2_generated_cjk_compatible.cc',
         'src/internal/cld2_generated_deltaoctachrome0122.cc',
         'src/internal/cld2_generated_distinctoctachrome0122.cc',
@@ skipping 60 matching lines @@
         }],
         ['cld2_table_size==2', {
           # Large table sizes
           'sources+': [
             'src/internal/cld2_generated_quadchrome0122_2.cc',
            ],
         }],
       ],
     },
     {
+      # GN version: //third_party/cld_2
       'target_name': 'cld_2',
       'type': 'static_library',
       'include_dirs': [
         'src/internal',
         'src/public',
       ],
       'sources': [
+        # Note: sources list duplicated in GN build.
         'src/internal/cld2tablesummary.h',
         'src/internal/cldutil.cc',
         'src/internal/cldutil.h',
         'src/internal/cldutil_shared.cc',
         'src/internal/cldutil_shared.h',
         'src/internal/compact_lang_det.cc',
         'src/internal/compact_lang_det_hint_code.cc',
         'src/internal/compact_lang_det_hint_code.h',
         'src/internal/compact_lang_det_impl.cc',
         'src/internal/compact_lang_det_impl.h',
@@ skipping 78 matching lines @@
                   'src/internal/cld2_generated_quadchrome0122_2.cc',
                  ],
               }],
             ],
           },
         ],
       ],
     },
   ],
 }