Fix generated server code to be strong mode compliant

Fix generated server code to be strong mode compliant

R=scheglov@google.com

Committed: https://github.com/dart-lang/sdk/commit/301a6a4725cfe2901133d173541a00ca8323dcb9

[Brian Wilkerson, 2016-03-31 17:37:40]

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

[scheglov, 2016-03-31 17:39:58]

LGTM

[Brian Wilkerson, 2016-03-31 17:44:45]

Description was changed from

==========
Fix generated server code to be strong mode compliant
==========

to

==========
Fix generated server code to be strong mode compliant

R=scheglov@google.com

Committed:
https://github.com/dart-lang/sdk/commit/301a6a4725cfe2901133d173541a00ca8323dcb9
==========

[Brian Wilkerson, 2016-03-31 17:44:47]

Committed patchset #1 (id:1) manually as
301a6a4725cfe2901133d173541a00ca8323dcb9 (presubmit successful).

[Paul Berry, 2016-03-31 18:30:43]

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

[Paul Berry, 2016-03-31 18:30:44]

https://codereview.chromium.org/1852473002/diff/1/pkg/analysis_server/tool/sp...
File pkg/analysis_server/tool/spec/codegen_dart_protocol.dart (right):

https://codereview.chromium.org/1852473002/diff/1/pkg/analysis_server/tool/sp...
pkg/analysis_server/tool/spec/codegen_dart_protocol.dart:983:
'jsonDecoder.decodeList($jsonPath, $json, ${itemCode.asClosure}) as
${dartType(type)}');
Would it be possible to avoid the type cast by making decodeList a generic
function, so that instead of:

  jsonDecoder.decodeList(...) as List<Foo>

we do this instead?

  jsonDecoder.decodeList/*<Foo>*/(...)