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rsesek@chromium.org authored
This adds UMA-uploaded histograms of sampling intervals for key points of data: * Total time spent in a CFRunLoop * Total time waiting in CFRunLoop * Total time servicing MessagePump::Delegate (the MessageLoop) * The MessageLoop queue size and queueing delay before servicing It adds 1 second sampling for 15 seconds at startup, only for the main thread (NSApplication-based) run loops. The data will be used to determine if adding scheduling-like behavior to the MessagePump will result in more efficient processing of the MessageLoop work. An unforunate side effect of this change is exposing another method on the MessagePump::Delegate interface, but there does not appear to be a better way to do this. BUG=264886 R=jar@chromium.org, mark@chromium.org Review URL: https://codereview.chromium.org/22911026 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@221427 0039d316-1c4b-4281-b951-d872f2087c98
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