Reverts the following two commits:

Reverts the following two commits:
"Add support for the new function-type syntax." # e4999a631093690febb2eb90cbdbe1f9d5183455.
"In function-type test: remove unused variables, make type stronger." # 02ffb3b1403d4c5ee87435aa7eb9da39c01a5759.

Reason to revert:
We found user code breaks because of ambiguous cases like this:

   ```
   class Function extends Foo {
      Function() : super();
   }
   ```

Today this fails when trying to parse the constructor.

We need to:
 * indicate this is not allowed anymore (probably at the class declaration)
 * allow it until we are ready to make it a breaking change (by maybe
 adding a special exception to allow this ambiguity in the syntax).
 * consider the language change to see whether we can prevent the breaking
 change if we use a different keyword.

BUG=
R=floitsch@google.com

Committed: https://github.com/dart-lang/sdk/commit/c64c35153905fc2bf8a74c02297220385cfcbc87

[Siggi Cherem (dart-lang), 2017-01-17 22:44:42]

sigmund@google.com changed reviewers:
+ floitsch@google.com

[floitsch, 2017-01-18 18:05:34]

LGTM :(

[Siggi Cherem (dart-lang), 2017-01-18 18:13:45]

Description was changed from

==========
Reverts the following two commits:
"Add support for the new function-type syntax." #
e4999a631093690febb2eb90cbdbe1f9d5183455.
"In function-type test: remove unused variables, make type stronger." #
02ffb3b1403d4c5ee87435aa7eb9da39c01a5759.

Reason to revert:
We found user code breaks because of ambiguous cases like this:

   ```
   class Function extends Foo {
      Function() : super();
   }
   ```

Today this fails when trying to parse the constructor.

We need to:
 * indicate this is not allowed anymore (probably at the class declaration)
 * allow it until we are ready to make it a breaking change (by maybe
 adding a special exception to allow this ambiguity in the syntax).
 * consider the language change to see whether we can prevent the breaking
 change if we use a different keyword.

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

to

==========
Reverts the following two commits:
"Add support for the new function-type syntax." #
e4999a631093690febb2eb90cbdbe1f9d5183455.
"In function-type test: remove unused variables, make type stronger." #
02ffb3b1403d4c5ee87435aa7eb9da39c01a5759.

Reason to revert:
We found user code breaks because of ambiguous cases like this:

   ```
   class Function extends Foo {
      Function() : super();
   }
   ```

Today this fails when trying to parse the constructor.

We need to:
 * indicate this is not allowed anymore (probably at the class declaration)
 * allow it until we are ready to make it a breaking change (by maybe
 adding a special exception to allow this ambiguity in the syntax).
 * consider the language change to see whether we can prevent the breaking
 change if we use a different keyword.

BUG=
R=floitsch@google.com

Committed:
https://github.com/dart-lang/sdk/commit/c64c35153905fc2bf8a74c02297220385cfcbc87
==========

[Siggi Cherem (dart-lang), 2017-01-18 18:13:46]

Committed patchset #1 (id:1) manually as
c64c35153905fc2bf8a74c02297220385cfcbc87 (presubmit successful).