Index: packagerChrome.py
diff --git a/packagerChrome.py b/packagerChrome.py
index 42fff4d8d908559a8bb08a0591a7fbdfa6a1a1dd..1845c2e7b980ce427585da6a3e04ebcaa861a7fe 100644
--- a/packagerChrome.py
+++ b/packagerChrome.py
@@ -354,6 +354,12 @@ def add_devenv_requirements(files, metadata, params):
         )
 
 
+def add_revision_file(base_dir, files):
+    if os.path.exists(os.path.join(base_dir, '.git')):
+        cmd = ['git', 'rev-parse', 'HEAD']
+        files['.revision'] = subprocess.check_output(cmd, cwd=base_dir).strip()
+
+
 def createBuild(baseDir, type='chrome', outFile=None, buildNum=None, releaseBuild=False, keyFile=None, devenv=False):
     metadata = readMetadata(baseDir, type)
     version = getBuildVersion(baseDir, metadata, releaseBuild, buildNum)
@@ -392,6 +398,10 @@ def createBuild(baseDir, type='chrome', outFile=None, buildNum=None, releaseBuil
         import_locales(params, files)
 
     files['manifest.json'] = createManifest(params, files)
+
+    if not releaseBuild and not devenv:
+        add_revision_file(baseDir, files)
+
     if type == 'chrome':
         fix_translations_for_chrome(files)