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groby@chromium.org authored
As per request from lpromero, reverting since it might be failing a test - see http://build.chromium.org/p/chromium.memory.fyi/builders/Windows%20Tests%20%28tsan%29/builds/17153/steps/memory%20test%3A%20base_unittests/logs/stdio [ RUN ] HistogramTest.BasicTest [3824:2780:1220/111332:4747750:FATAL:statistics_recorder.cc(270)] Check failed: !histograms_. TBR=lpromero@chromium.org > Reland "Add a HistogramRecorder class and use cases." > > This CL adds a utility class to streamline the task of testing that metrics have been updated as expected. Specifically, the HistogramRecorder class allows a client to obtain the differential value of a given histogram in the interval since the given HistogramRecorder instance was created. > > This reverts commit b957026f. > > BUG=232414 > TBR=rsleevi, mark, groby, thakis > > Review URL: https://codereview.chromium.org/19866004 TBR=lpromero@chromium.org Review URL: https://codereview.chromium.org/120273002 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@242176 0039d316-1c4b-4281-b951-d872f2087c98
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