Migrate test block 4 to Dart 2.0.

Migrate test block 4 to Dart 2.0.

Unusual things in this block:
- corelib_strong/data_uri_test.dart was behind corelib, so migrated
that file from corelib.
- core_runtime_types_test was split per the document into static
and non-static versions
- data_resource_test.dart is now pointless since class Resource
was moved from dart:core to http://github.com/dart-lang/resource,
so deleted.

BUG=
R=rnystrom@google.com

Committed: https://github.com/dart-lang/sdk/commit/b1da48a29de7e3d359ff8b841701492c58e4c0ef

[jcollins, 2017-07-19 21:31:28]

jcollins@google.com changed reviewers:
+ bkonyi@google.com, rnystrom@google.com

[jcollins, 2017-07-19 21:31:28]

jcollins@google.com changed required reviewers:
+ rnystrom@google.com

[jcollins, 2017-07-19 21:34:16]

Description was changed from

==========
Migrate test block 4 to Dart 2.0.

Unusual things in this block:
- corelib_strong/data_uri_test.dart was behind corelib, so migrated
that file from corelib.
- core_runtime_types_test was split per the documennt into static
and non-static versions
- data_resource_test.dart is now pointless since class Resource
was moved from dart:core to http://github.com/dart-lang/resource,
so deleted.

BUG=
==========

to

==========
Migrate test block 4 to Dart 2.0.

Unusual things in this block:
- corelib_strong/data_uri_test.dart was behind corelib, so migrated
that file from corelib.
- core_runtime_types_test was split per the document into static
and non-static versions
- data_resource_test.dart is now pointless since class Resource
was moved from dart:core to http://github.com/dart-lang/resource,
so deleted.

BUG=
==========

[Bob Nystrom, 2017-07-20 00:10:12]

lgtm

[jcollins, 2017-07-21 15:24:34]

Description was changed from

==========
Migrate test block 4 to Dart 2.0.

Unusual things in this block:
- corelib_strong/data_uri_test.dart was behind corelib, so migrated
that file from corelib.
- core_runtime_types_test was split per the document into static
and non-static versions
- data_resource_test.dart is now pointless since class Resource
was moved from dart:core to http://github.com/dart-lang/resource,
so deleted.

BUG=
==========

to

==========
Migrate test block 4 to Dart 2.0.

Unusual things in this block:
- corelib_strong/data_uri_test.dart was behind corelib, so migrated
that file from corelib.
- core_runtime_types_test was split per the document into static
and non-static versions
- data_resource_test.dart is now pointless since class Resource
was moved from dart:core to http://github.com/dart-lang/resource,
so deleted.

BUG=
R=rnystrom@google.com

Committed:
https://github.com/dart-lang/sdk/commit/b1da48a29de7e3d359ff8b841701492c58e4c0ef
==========

[jcollins, 2017-07-21 15:24:35]

Committed patchset #2 (id:20001) manually as
b1da48a29de7e3d359ff8b841701492c58e4c0ef (presubmit successful).

[jcollins, 2017-07-21 15:41:11]

On 2017/07/21 15:24:35, jcollins wrote:
> Committed patchset #2 (id:20001) manually as
> b1da48a29de7e3d359ff8b841701492c58e4c0ef (presubmit successful).

This seems to have broken the bots despite my testing, looking at it now.