Change function source fingerprint calculation to rely on tokens exclusively and

Change function source fingerprint calculation to rely on tokens exclusively and
not on the signature type hash anymore. This makes fingerprints insensitive to
implementation details of the type system. The signature type hash was included
because, in the early days, the token stream of a function started at the
opening brace and did not include tokens representing the signature.

R=srdjan@google.com

Committed: https://github.com/dart-lang/sdk/commit/e66d65f7b97cb763347a4f70f3fad711bda18dba

[regis, 2016-02-29 22:20:48]

regis@google.com changed reviewers:
+ fschneider@google.com, srdjan@google.com

[srdjan, 2016-02-29 22:55:53]

STV, LGTM

[regis, 2016-02-29 22:59:25]

Description was changed from

==========
Change function source fingerprint calculation to rely on tokens exclusively and
not on the signature type hash anymore. This makes fingerprints insensitive to
implementation details of the type system. The signature type hash was included
because, in the early days, the token stream of a function started at the
opening brace and did not include tokens representing the signature.
==========

to

==========
Change function source fingerprint calculation to rely on tokens exclusively and
not on the signature type hash anymore. This makes fingerprints insensitive to
implementation details of the type system. The signature type hash was included
because, in the early days, the token stream of a function started at the
opening brace and did not include tokens representing the signature.

R=srdjan@google.com

Committed:
https://github.com/dart-lang/sdk/commit/e66d65f7b97cb763347a4f70f3fad711bda18dba
==========

[regis, 2016-02-29 22:59:26]

Committed patchset #1 (id:1) manually as
e66d65f7b97cb763347a4f70f3fad711bda18dba (presubmit successful).