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 23 matching lines @@
               ],
               'sources': [
                 'app/chrome_command_ids.h',
                 'app/chrome_dll.rc',
                 'app/chrome_dll_resource.h',
                 'app/chrome_main.cc',
                 'app/chrome_main_delegate.cc',
                 'app/chrome_main_delegate.h',
 
                 '<(SHARED_INTERMEDIATE_DIR)/chrome_version/chrome_dll_version.rc',
+                '../base/win/dllmain.cc',
 
                 '../webkit/glue/resources/aliasb.cur',
                 '../webkit/glue/resources/cell.cur',
                 '../webkit/glue/resources/col_resize.cur',
                 '../webkit/glue/resources/copy.cur',
                 '../webkit/glue/resources/none.cur',
                 '../webkit/glue/resources/row_resize.cur',
                 '../webkit/glue/resources/vertical_text.cur',
                 '../webkit/glue/resources/zoom_in.cur',
                 '../webkit/glue/resources/zoom_out.cur',
@@ skipping 443 matching lines @@
                   ],
                 }],
               ],  # conditions
             }],  # OS=="mac"
           ],  # conditions
         },  # target chrome_dll
       ],  # targets
     }],  # OS=="mac" or OS=="win"
   ],
 }