* Update project.pbxproj files to say Flutter rather than Chromium
Also, the templates now have an empty organization so that we don't cause people to give their apps a Flutter copyright.
* Update the copyright notice checker to require a standard notice on all files
* Update copyrights on Dart files. (This was a mechanical commit.)
* Fix weird license headers on Dart files that deviate from our conventions; relicense Shrine.
Some were already marked "The Flutter Authors", not clear why. Their
dates have been normalized. Some were missing the blank line after the
license. Some were randomly different in trivial ways for no apparent
reason (e.g. missing the trailing period).
* Clean up the copyrights in non-Dart files. (Manual edits.)
Also, make sure templates don't have copyrights.
* Fix some more ORGANIZATIONNAMEs
* Stop using build_runner for dart2js
* fixes to yield when computing hashes and to imports
* add missing await
* Update filecache_test.dart
* Fix paths in filecache test
* use file uri for import
* add test cases and configurable override
* remove test dep
* fix filepaths for windows
* test no longer failing
* fix paths for test cases
* fix typo
* address comments
* make a constant
* make filehash async and use constant
* fix silly logic error
