Handle null timer values when profiling sections

Null time values can appear if the profiler is
not ACTIVE, and the Now() function returns a Null
value (to avoid wasting time and calling the OS Time).

r=rtenneti
Review URL: http://codereview.chromium.org/8573017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@110215 0039d316-1c4b-4281-b951-d872f2087c98


CrOS-Libchrome-Original-Commit: fd0a645508f9b2a4a4c0b2498fca24ddc0a772b0
1 file changed
tree: 5617dfe30ae390a45c062f592bf0b8d4fe4ed495
  1. base/
  2. build/
  3. dbus/
  4. ipc/
  5. testing/
  6. third_party/