Cleanup stale files from android_webview license check.

Also check for missing files in the white list.

NOTRY=true

Review URL: https://codereview.chromium.org/301903002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@273593 0039d316-1c4b-4281-b951-d872f2087c98

android_webview/tools/third_party_files_whitelist.txt

@@ -163,16 +163,10 @@ ui/base/dragdrop/os_exchange_data_provider_win.cc
 # up from webkit/.
 ui/events/keycodes/keyboard_codes_posix.h
 # String 'copyright' used in code.
-ui/file_manager/gallery/js/gallery_scripts.js
-# String 'copyright' used in code.
-ui/file_manager/file_manager/foreground/js/photo/gallery_scripts.js
-# String 'copyright' used in code.
 ui/file_manager/file_manager/foreground/js/main_scripts.js
 # String 'copyright' used in code.
 ui/file_manager/file_manager/foreground/js/media/mediaplayer_scripts.js
 # String 'copyright' used in code.
-ui/file_manager/file_manager/audio_player/js/audio_player_scripts.js
-# String 'copyright' used in code.
 ui/file_manager/video_player/js/video_player_scripts.js
 # This third-party code is taken from Mozilla, but is copyright Google and has
 # been re-licensed under the Chromium license.
@@ -192,5 +186,3 @@ webkit/browser/appcache/manifest_parser.h
 # and (MPL, GPL v2 or LGPL v2) licenses. This third-party code is taken from
 # Mozilla, the license for which we already pick up from third_party/npapi/.
 webkit/child/multipart_response_delegate.h
-# False positive. This is a generated file which includes polymer code.
-chrome/browser/resources/pdf/index.js

android_webview/tools/webview_licenses.py

@@ -180,10 +180,14 @@ def _CheckLicenseHeaders(excluded_dirs_list, whitelisted_files):
     print 'The following files are whitelisted unnecessarily. You must ' \
           'remove the following files from the whitelist.\n%s' % \
           '\n'.join(sorted(stale))
+  missing = [f for f in whitelisted_files if not os.path.exists(f)]
+  if missing:
+    print 'The following files are whitelisted, but do not exist.\n%s' % \
+        '\n'.join(sorted(missing))
 
   if unknown:
     return ScanResult.Errors
-  elif stale:
+  elif stale or missing:
     return ScanResult.Warnings
   else:
     return ScanResult.Ok