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Looking at the tryjobs for patchset 4 of this CL (which removes
all WPR archives and redownloads only the ones relevant to the platform
being run), and patchset 10 (which checks baseline, in the mac_chromium_compile_dbg_ng build)
we see the following:

Without change: 791.95s
Android: 104.41s
Win: 189.83s
Mac: 286.69s
Linux: 113s

Change-Id: I5c14eb69cc7f13997910e2759130cdcba9eef5ba
Bug: chromium:1056387
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2425303
Commit-Queue: Ryan Heise <heiserya@google.com>
Auto-Submit: Ryan Heise <heiserya@google.com>
Reviewed-by: John Chen <johnchen@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@google.com>
Cr-Commit-Position: refs/heads/master@{#810397}