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reveman@chromium.org authored
This adds a task graph interface to the worker pool and implements a simple queue instance of this interface for use by the tile manager. The task graph interface can be used describe more complicated task dependencies in the future and provides the immediate benefit of seamlessly being able to cancel and re-prioritize tasks. BUG=178974,244642 TEST=cc_unittests --gtest_filter=WorkerPoolTest.Dependencies Review URL: https://chromiumcodereview.appspot.com/14689004 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@203041 0039d316-1c4b-4281-b951-d872f2087c98
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