crash-reporter: Fix coding style and cpplint issues.

BUG=chromium:385849
TEST=`FEATURES=test emerge-$BOARD platform2`
TEST=`cpplint.py --filter=--build/header_guard,-build/include_order *.h *.cc`

Change-Id: I3c24dd9487df50cdb22fc1c7739c9e95e452afae
Reviewed-on: https://chromium-review.googlesource.com/204487
Tested-by: Ben Chan <benchan@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Ben Chan <benchan@chromium.org>
24 files changed