Introduce the support required to test a Kasko-enabled build on Swarm.

chrome/chrome.isolate

 # Copyright (c) 2013 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=="linux"', {
       'variables': {
         'files': [
           '<(PRODUCT_DIR)/libffmpegsumo.so',
           '<(PRODUCT_DIR)/libosmesa.so',
@@ skipping 105 matching lines @@
         ],
       },
     }],
     ['OS=="win" and component=="static_library"', {
       'variables': {
         'files': [
           '<(PRODUCT_DIR)/chrome_child.dll',
         ],
       },
     }],
+    ['kasko==1', {

[M-A Ruel, 2015/05/01 20:17:24]

I'd still prefer to gate it also on OS=="win", in case there's kasko of other
OSes one day and it also help describing the subset. Same for other isolate
files.

+      'variables': {
+        'files': [
+          '<(PRODUCT_DIR)/kasko.dll',
+        ],
+      },
+    }],
   ],
   'includes': [
     '../base/base.isolate',
     '../third_party/angle/angle.isolate',
     '../gin/v8.isolate',
   ],
 }