Fix googletest/googlemock build

1. testing.gyp is a gyp file, not a gypi file. It is only referenced in
“dependencies” sections. The gypi extension is used for files that are
included by an “includes” section.

2. Update paths in testing.gyp to reflect the real locations of
googletest and googlemock following their merge into a single
repository.

Change-Id: If9c356d93aa5ffda54af46fbed648baa2274dac6
Reviewed-on: https://chromium-review.googlesource.com/673404
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Cr-Mirrored-From: https://chromium.googlesource.com/breakpad/breakpad
Cr-Mirrored-Commit: 491f174949cd8d612728bc9040fe9e7a0950b7d8
3 files changed