Enable test-specific factory properties for endure.
Enable test-specific factory properties for endure.

With the current design, we can only specify one set of factory properties per builder. For endure, we need different properties for different tests that might run on the same builder.

This CL allows augmenting FPs per test by using a new FP, which is a dict: test name -> dict: test-specific FP key -> FP value.

Those FPs are updated only for the specific test.

Review URL: https://chromiumcodereview.appspot.com/23851023

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@223371 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build