Add crash key for Mac video capture

This CL calls SetCrashKeyValue() if a video capture device is opened. This can
be used to determine if the crash involves video capture or if simply
enumerating video capture device is enough to cause a crash.

BUG=139164


Review URL: https://chromiumcodereview.appspot.com/11096030

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@161025 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed