Add [TypeChecking=Unrestricted] to SubtleCrypto interface

This only changes the error messages of the TypeError exceptions thrown.

Also clean up C++-side error handling, some of which was already
unnecessary.

BUG=462561

Review URL: https://codereview.chromium.org/978353002

git-svn-id: svn://svn.chromium.org/blink/trunk@191380 bbb929c8-8fbe-4397-9dbb-9b2b20218538
7 files changed
tree: 54c81bf775cba682911f2dd27f55b0e7d52967a8
  1. third_party/