Roll src/third_party/devtools-frontend/src e27cd5339842..b6b755afe678 (3 commits)

https://chromium.googlesource.com/devtools/devtools-frontend.git/+log/e27cd5339842..b6b755afe678

git log e27cd5339842..b6b755afe678 --date=short --first-parent --format='%ad %ae %s'
2020-02-03 tvanderlippe@chromium.org Migrate workspace_diff/ to import cross-module
2020-02-03 tvanderlippe@chromium.org Prepare AuditsService for audits_worker change
2020-02-03 aerotwist@chromium.org [e2e] Update helper to use hosted mode instead of file protocol

Created with:
  gclient setdep -r src/third_party/devtools-frontend/src@b6b755afe678

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/devtools-frontend-chromium
Please CC devtools-waterfall-sheriff-onduty@grotations.appspotmail.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

Bug: chromium:1006759,chromium:1047667
Tbr: devtools-waterfall-sheriff-onduty@grotations.appspotmail.com
Change-Id: I9f208b875ebe4c31cfb804d05a50e98bdaa7403b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2035593Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#737737}

DEPS

@@ -247,7 +247,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling devtools-frontend
   # and whatever else without interference from each other.
-  'devtools_frontend_revision': 'e27cd53398427a50e1e517b3cbab44451335079c',
+  'devtools_frontend_revision': 'b6b755afe678c62cbe7dd1f2f8e155e0f64908f9',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libprotobuf-mutator
   # and whatever else without interference from each other.