Roll dart to ee15c8eb689791f6777eb3f6b0a1e9c58ff0671b. (#4736)

* Roll dart to ee15c8eb689791f6777eb3f6b0a1e9c58ff0671b.

* Update dart deps

* Skip over .emf-files.

.emf-files are binary media files in Microsoft enhanced mediaformat.

* Update license

* Cleanup license

* Clean up 3rd party licenses

DEPS

@@ -31,24 +31,24 @@ vars = {
   # Dart is: https://github.com/dart-lang/sdk/blob/master/DEPS.
   # You can use //tools/dart/create_updated_flutter_deps.py to produce
   # updated revision list of existing dependencies.
-  'dart_revision': '1aaebedd7045a44ba92bb1bb27c3a8bc25d74856',
+  'dart_revision': 'ee15c8eb689791f6777eb3f6b0a1e9c58ff0671b',
 
   'dart_args_tag': '0.13.7',
   'dart_async_tag': '2.0.4',
   'dart_barback_tag': '0.15.2+14',
   'dart_bazel_worker_tag': 'v0.1.9',
   'dart_boolean_selector_tag': '1.0.2',
-  'dart_boringssl_gen_rev': 'd2b56d1b7657e52eb5a1f075968c773aa3e53614',
-  'dart_boringssl_rev': 'd519bf6be0b447fb80fbc539d4bff4479b5482a2',
+  'dart_boringssl_gen_rev': '39762c7f9ee4d828ff212838fae79528b94d5443',
+  'dart_boringssl_rev': 'a62dbf88d8a3c04446db833a1eb80a620cb1514d',
   'dart_charcode_tag': 'v1.1.1',
   'dart_cli_util_tag': '0.1.2+1',
-  'dart_collection_tag': '1.14.5',
+  'dart_collection_tag': '5943e1681204250f33a833eb5550f270357ad6c8',
   'dart_convert_tag': '2.0.1',
   'dart_crypto_tag': '2.0.2+1',
   'dart_csslib_tag': '0.14.1',
   'dart_dart2js_info_tag': '0.5.5+1',
-  'dart_dart_style_tag': '1.0.9',
-  'dart_dartdoc_tag': 'v0.16.0',
+  'dart_dart_style_tag': '1.0.10',
+  'dart_dartdoc_tag': 'v0.17.0',
   'dart_fixnum_tag': '0.10.5',
   'dart_glob_tag': '1.1.5',
   'dart_html_tag': '0.13.2+2',
@@ -75,9 +75,9 @@ vars = {
   'dart_plugin_tag': '0.2.0+2',
   'dart_pool_tag': '1.3.4',
   'dart_protobuf_tag': '0.7.0',
-  'dart_pub_rev': '64c5f40adf6828da1b63320dd39bcedbef1354c6',
+  'dart_pub_rev': '73ff0d3d9f80f60d41e3135ac44597d011abb4f3',
   'dart_pub_semver_tag': '1.3.2',
-  'dart_quiver_tag': '0.28.0',
+  'dart_quiver_tag': '5aaa3f58c48608af5b027444d561270b53f15dbf',
   'dart_resource_rev': 'af5a5bf65511943398146cf146e466e5f0b95cb9',
   'dart_root_certificates_rev': '16ef64be64c7dfdff2b9f4b910726e635ccc519e',
   'dart_shelf_packages_handler_tag': '1.0.3',

tools/licenses/pubspec.lock

@@ -58,4 +58,4 @@ packages:
     source: hosted
     version: "1.1.5"
 sdks:
-  dart: ">=1.21.0 <=2.0.0-dev.22.0"
+  dart: ">=1.21.0 <=2.0.0-dev.23.0"