[l10n] Adds an internal clank option to the upload screenshot tool.

The upload screenshot tool now optionally captures screenshots
for translated strings in the downstream clank directory. This allows
engineers who are adding strings to features located in the clank
directory to integrate with the existing translation tooling.

Bug: 1122780
Change-Id: I348caf20c09cf22a0924d154ef4bdcc7902e70af
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2380328Reviewed-by: Mustafa Emre Acer <meacer@chromium.org>
Commit-Queue: Jeffrey Cohen <jeffreycohen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#802732}

tools/translation/upload_screenshots.py

@@ -38,6 +38,10 @@ import download_from_google_storage
 
 sys.path.remove(depot_tools_path)
 
+# Translation expectations file for the clank repo.
+INTERNAL_TRANSLATION_EXPECTATIONS_PATH = os.path.join(
+    'clank', 'tools', 'translation_expectations.pyl')
+
 # Translation expectations file for the Chromium repo.
 TRANSLATION_EXPECTATIONS_PATH = os.path.join('tools', 'gritsettings',
                                              'translation_expectations.pyl')
@@ -131,11 +135,20 @@ def main():
       '--dry-run',
       action='store_true',
       help='Don\'t actually upload the images')
+  parser.add_argument(
+      '-c',
+      '--clank_internal',
+      action='store_true',
+      help='Upload screenshots for strings in the downstream clank directory')
   args = parser.parse_args()
+  if args.clank_internal:
+    screenshots = find_screenshots(
+        os.path.join(src_path, "clank"),
+        os.path.join(src_path, INTERNAL_TRANSLATION_EXPECTATIONS_PATH))
 
-  screenshots = find_screenshots(src_path,
-                                 os.path.join(src_path,
-                                              TRANSLATION_EXPECTATIONS_PATH))
+  else:
+    screenshots = find_screenshots(
+        src_path, os.path.join(src_path, TRANSLATION_EXPECTATIONS_PATH))
   if not screenshots:
     print ("No screenshots found.\n\n"
            "- Screenshots must be located in the correct directory.\n"