Don't compile with TraceLog support on by default.

This is just some experimental performance code.  Previously it was creating
a singleton object which created a ProcessMetrics object.  This caused a bunch
of possibly expensive calls to query system information to happen on startup.

Review URL: http://codereview.chromium.org/174118


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@23819 0039d316-1c4b-4281-b951-d872f2087c98


CrOS-Libchrome-Original-Commit: 70a8d1a90a8a045da35e81b1561db19a03ff8c6f
1 file changed
tree: 59cc7226b62a16d8392589e0489481b436a6ef8f
  1. base/
  2. build/
  3. ipc/
  4. testing/