Please merge r=44876 into 1.9.x stable

[DartBot]

<img src="https://avatars.githubusercontent.com/u/188?v=3" align="left" width="96" height="96"hspace="10"> Issue by nex3
Originally opened as dart-lang/sdk#23085

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E.g.: This fixes issue #5, which causes transformers to fail to load under some circumstances. This is particularly important for getting the new test runner working with projects using transformers, including projects using Polymer and Angular.

Please merge dart-lang/sdk@fb830b7.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/5475521?v=3" align="left" width="48" height="48"hspace="10"> Comment by ricowind

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Updating label to MergeToStable

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Removed MergeToDev label.
Added MergeToStable label.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/5475521?v=3" align="left" width="48" height="48"hspace="10"> Comment by ricowind

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I have merged the cls to the stable branch, I will not mark these fixed until we ship it on stable channel

[DartBot]

<img src="https://avatars.githubusercontent.com/u/5475521?v=3" align="left" width="48" height="48"hspace="10"> Comment by ricowind

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1.9.3 has shipped on stable channel

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Added Fixed label.