Create top-level separate targets for browser and child dlls

chrome/chrome_syzygy.gyp

 # 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=="win" and fastbuild==0 and chrome_split_dll==0', {
+    ['OS=="win" and fastbuild==0 and chrome_multiple_dll==0', {
       # Reorder or instrument the initial chrome DLL executable, placing the
       # optimized output and corresponding PDB file into the "syzygy"
       # subdirectory.
       # This target won't build in fastbuild, since there are no PDBs.
       'targets': [
         {
           'target_name': 'chrome_dll_syzygy',
           'type': 'none',
           'sources' : [],
           'dependencies': [
@@ skipping 59 matching lines @@
                   ],
                 },
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }