Correct reference to ProjectIsContentMerging.
Correct reference to ProjectIsContentMerging.

Also fix _FilterNonCrosProjects to use strict=False, since it is
supposed to be OK with changes that are not in the manifest.
Followup to CL:176361.

BUG=chromium:314917
TEST=Trybot run with --buildbot --debug

Change-Id: I802245a4adcec3ed778cc4f66cac8e8c97c11ba3
Reviewed-on: https://chromium-review.googlesource.com/176909
Reviewed-by: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>
Tested-by: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>

chadversary/chromiumos.chromite,bpsinc-native/src_third_party_chromite,chadversary/chromiumos.chromite,bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite