Begin moving code generation tools from analysis_server to analyzer.

Begin moving code generation tools from analysis_server to analyzer.

This CL introduces the code generation tools in analyzer, but leaves analysis_server
untouched.  In a later CL, after a new version of analyzer has been
published, I'll refactor analysis_server to point to these tools and
remove the corresponding code from analysis_server.

R=scheglov@google.com

Committed: https://github.com/dart-lang/sdk/commit/9efcce02c314efd82dcc57a2a6a5a9592cec88d1

[Paul Berry, 2015-10-21 21:56:40]

Description was changed from

==========
Begin moving code generation tools from analysis_server to analyzer.

This CL introduces the code generation tools in analyzer, and modifies
analyzer codegen logic to use them, but leaves analysis_server
untouched.  In a later CL, after a new version of analyzer has been
published, I'll refactor analysis_server to point to these tools and
remove the corresponding code from analysis_server.
==========

to

==========
Begin moving code generation tools from analysis_server to analyzer.

This CL introduces the code generation tools in analyzer, but leaves
analysis_server
untouched.  In a later CL, after a new version of analyzer has been
published, I'll refactor analysis_server to point to these tools and
remove the corresponding code from analysis_server.
==========

[Paul Berry, 2015-10-21 21:57:01]

paulberry@google.com changed reviewers:
+ scheglov@google.com

[scheglov, 2015-10-21 22:00:43]

LGTM

[Paul Berry, 2015-10-22 02:41:29]

Committed patchset #1 (id:1) manually as
9efcce02c314efd82dcc57a2a6a5a9592cec88d1 (presubmit successful).