tools: download gn from CIPD (#2912)

gclient_config.py

@@ -24,7 +24,7 @@ solutions = [{
     }
 }, {
     'url':
-    'https://chromium.googlesource.com/chromium/tools/depot_tools@40bacee96a94600ad2179d69a8025469d119960f',
+    'https://chromium.googlesource.com/chromium/tools/depot_tools@efce0d1b7657c440c90f0f4bce614b96672b9e0b',
     'name':
     'depot_tools'
 }, {

third_party @ 4b36ce22

-Subproject commit 71c3e6ebb675da304783757d9f7ff9ee790b835a
+Subproject commit 4b36ce22a2ef7310f815acb6a2de0d26766a24b6

tools/third_party.py

@@ -4,6 +4,7 @@
 
 import os
 from os import path
+import re
 import site
 import sys
 from tempfile import mkdtemp
@@ -208,9 +209,42 @@ def download_from_google_storage(item, bucket):
         env=google_env())
 
 
+# Download the given item from Chrome Infrastructure Package Deployment.
+def download_from_cipd(item, version):
+    if sys.platform == 'win32':
+        root_dir = "v8/buildtools/win"
+        item += "windows-amd64"
+    elif sys.platform == 'darwin':
+        root_dir = "v8/buildtools/mac"
+        item += "mac-amd64"
+    elif sys.platform.startswith('linux'):
+        root_dir = "v8/buildtools/linux64"
+        item += "linux-amd64"
+
+    # init cipd if necessary
+    if not os.path.exists(path.join(tp(root_dir), ".cipd")):
+        run([
+            tp('depot_tools/cipd'),
+            'init',
+            tp(root_dir),
+            '-force',
+        ],
+            env=google_env())
+
+    run([
+        tp('depot_tools/cipd'),
+        'install',
+        item,
+        'git_revision:' + version,
+        '-root',
+        tp(root_dir),
+    ],
+        env=google_env())
+
+
 # Download gn from Google storage.
 def download_gn():
-    download_from_google_storage('gn', 'chromium-gn')
+    download_from_cipd('gn/gn/', '152c5144ceed9592c20f0c8fd55769646077569b')
 
 
 # Download clang-format from Google storage.