Shard webcore_dom to avoid MSVS 2 GB limitation

third_party/WebKit/Source/core/core.gyp

 #
 # Copyright (C) 2009 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 271 matching lines @@
       'target_name': 'webcore_dom',
       'type': 'static_library',
       'dependencies': [
         'webcore_prerequisites',
       ],
       'sources': [
         '<@(webcore_dom_files)',
       ],
       # Disable c4267 warnings until we fix size_t to int truncations.
       'msvs_disabled_warnings': [ 4267, ],
+      'conditions': [
+        # Shard this target into parts to work around linker limitations.
+        # on link time code generation builds. See crbug.com/599186
+        ['OS=="win" and buildtype=="Official"', {
+          'msvs_shard': 5,

[dcheng, 2016/03/30 23:17:25]

Out of curiosity, why 5?

[brucedawson, 2016/03/30 23:32:06]

No particular reason - copy/paste with no reason to change it.

Anything from 2 to 200 would probably work equally well, although creating more
than a few sub-libs is messy and adds no value.

+        }],
+      ],
     },
     {
       # GN version: //third_party/WebKit/Source/core:html
       'target_name': 'webcore_html',
       'type': 'static_library',
       'dependencies': [
         'webcore_prerequisites',
       ],
       'sources': [
         '<@(webcore_html_files)',
       ],
       'conditions': [
-        # Shard this taret into parts to work around linker limitations.
+        # Shard this target into parts to work around linker limitations.
         # on link time code generation builds.
         ['OS=="win" and buildtype=="Official"', {
           'msvs_shard': 5,
         }],
         ['OS!="android"', {
           'sources/': [
             ['exclude', 'Android\\.cpp$'],
           ],
         }],
       ],
@@ skipping 18 matching lines @@
       # GN version: //third_party/WebKit/Source/core:rendering
       'target_name': 'webcore_rendering',
       'type': 'static_library',
       'dependencies': [
         'webcore_prerequisites',
       ],
       'sources': [
         '<@(webcore_rendering_files)',
       ],
       'conditions': [
-        # Shard this taret into parts to work around linker limitations.
+        # Shard this target into parts to work around linker limitations.
         # on link time code generation builds.
         ['OS=="win" and buildtype=="Official"', {
           'msvs_shard': 5,
         }],
         ['OS=="win"', {
           'sources!': [
             'layout/LayoutThemeFontProviderDefault.cpp',
           ],
         },{ # OS!="win"
           'sources!': [
@@ skipping 306 matching lines @@
                 'layout/LayoutThemeAndroid.cpp',
                 'layout/LayoutThemeAndroid.h',
               ],
             }],
           ],
         }],
       ],
     },
   ],  # targets
 }