Add functionality to download files from GCS, and include them in the Chromoting isolate.

testing/chromoting/integration_tests.gyp

Index: testing/chromoting/integration_tests.gyp
diff --git a/testing/chromoting/integration_tests.gyp b/testing/chromoting/integration_tests.gyp
index 40c80eeed89d5295509cd905b9b420c859b8f693..23a18ea0fd23f9ed4d7356b28186f978e08e787f 100644
--- a/testing/chromoting/integration_tests.gyp
+++ b/testing/chromoting/integration_tests.gyp
@@ -47,6 +47,31 @@
           'sources': [
             'chromoting_integration_tests.isolate',
           ],
+          'actions': [
+            {
+              'action_name': 'download_test_files',
+              'variables': {
+                'dl_files_script': './download_test_files.py',
+                'files_list': './chromoting_test_files.txt',
+                'output_folder': './',
+              },
+              'inputs': [
+                '<(files_list)',
+              ],
+              'outputs': [
+                '<(output_folder)',
+              ],
+              'action': [
+                'python',
+                '<(dl_files_script)',
+                '--files',
+                '<(files_list)',
+                '--output_folder',
+                '<(output_folder)',
+              ],
+              'message': 'Downloading required Remoting test files.',
+            },
+          ],
         },  # target_name: 'chromoting_integration_tests_run'
       ],
     }],