tree 34084bdbde5fde3bcd0c57bb18b4887113bc89a5
parent 81ee1967d3fcbc829bac1c005c3da59739c88df9
author Tom Anderson <thomasanderson@chromium.org> 1557950420 -0700
committer Commit Bot <commit-bot@chromium.org> 1557957679 +0000

Cache source file type in SourceFile

This is in preparation for fixing bug 77.  Reduces the number of calls to
GetSourceFileType() from ~2 million to ~500 thousand when generating Chromium's
build files.

BUG=77
R=brettw

Change-Id: I044e5b5ebf41ce70769ae3818ea5989206f44453
Reviewed-on: https://gn-review.googlesource.com/c/gn/+/4960
Reviewed-by: Brett Wilson <brettw@google.com>
Commit-Queue: Brett Wilson <brettw@google.com>