Improve method use in common.DeepDependencyTargets. Speeds up windows generation for Chrome from 1:49 to 0:45.
Improve method use in common.DeepDependencyTargets.
Speeds up windows generation for Chrome from 1:49 to 0:45.

BUG=None
TEST=None

Review URL: http://codereview.chromium.org/3026026

git-svn-id: e7e1075985beda50ea81ac4472467b4f6e91fc78@839 78cadc50-ecff-11dd-a971-7dbc132099af

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