mojo: Replace assert() with DCHECK() in C++ tmpl file.

Chromium code generally doesn't use C's assert() macro, so the generated
code should follow that convention, too. There's already a DCHECK right
above the assert() calls in question, so this should be an overlook.

Change-Id: I70504d0e456a3675fe6773cd618050d2242839da
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1525764
Commit-Queue: Ken Rockot <rockot@google.com>
Auto-Submit: Yuta Kitamura <yutak@chromium.org>
Reviewed-by: Ken Rockot <rockot@google.com>
Cr-Commit-Position: refs/heads/master@{#641208}
1 file changed