Provide DllMain, and hook to support TLS callbacks.

chrome/chrome_dll.gypi

 # Copyright (c) 2011 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.
 {
   'conditions': [
     ['OS=="mac" or OS=="win"', {
       'targets': [
         {
           'target_name': 'chrome_dll',
           'type': 'shared_library',
@@ skipping 18 matching lines @@
                 '../printing/printing.gyp:printing',
                 '../net/net.gyp:net_resources',
                 '../third_party/cld/cld.gyp:cld',
                 '../views/views.gyp:views',
                 '../webkit/support/webkit_support.gyp:webkit_resources',
               ],
               'sources': [
                 'app/chrome_command_ids.h',
                 'app/chrome_dll.rc',
                 'app/chrome_dll_resource.h',
+                'app/chrome_dllmain.cc',
                 'app/chrome_main.cc',
                 'app/chrome_main_delegate.cc',
                 'app/chrome_main_delegate.h',
 
                 '<(SHARED_INTERMEDIATE_DIR)/chrome_version/chrome_dll_version.rc',
 
                 '../webkit/glue/resources/aliasb.cur',
                 '../webkit/glue/resources/cell.cur',
                 '../webkit/glue/resources/col_resize.cur',
                 '../webkit/glue/resources/copy.cur',
@@ skipping 448 matching lines @@
                   ],
                 }],
               ],  # conditions
             }],  # OS=="mac"
           ],  # conditions
         },  # target chrome_dll
       ],  # targets
     }],  # OS=="mac" or OS=="win"
   ],
 }