xp: copy dbghelp.dll to output dir and have base.isolate use it there

base/base.gyp

 # Copyright (c) 2012 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
     '../build/win_precompile.gypi',
@@ skipping 170 matching lines @@
                   'setupapi.dll',
                 ],
                 'AdditionalDependencies': [
                   'cfgmgr32.lib',
                   'powrprof.lib',
                   'setupapi.lib',
                 ],
               },
             },
           },
+          'copies': [
+            {
+              'destination': '<(PRODUCT_DIR)/',
+              'files': [
+                '../build/win/dbghelp_xp/dbghelp.dll',
+              ],
+            },
+          ],
         }],
         ['OS == "mac" or (OS == "ios" and _toolset == "host")', {
           'link_settings': {
             'libraries': [
               '$(SDKROOT)/System/Library/Frameworks/AppKit.framework',
               '$(SDKROOT)/System/Library/Frameworks/ApplicationServices.framework',
               '$(SDKROOT)/System/Library/Frameworks/Carbon.framework',
               '$(SDKROOT)/System/Library/Frameworks/CoreFoundation.framework',
               '$(SDKROOT)/System/Library/Frameworks/Foundation.framework',
               '$(SDKROOT)/System/Library/Frameworks/IOKit.framework',
@@ skipping 1359 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }