tools/metrics/histograms/histograms.xml - Issue 23874005: Ensure the 1993 NTP logs to UMA Most Visited tiles that use the fallback thumbnail instead of the p…

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Unified Diff: tools/metrics/histograms/histograms.xml

Issue 23874005: Ensure the 1993 NTP logs to UMA Most Visited tiles that use the fallback thumbnail instead of the p… (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src

Patch Set: Answered asvitkine comments Created 7 years, 3 months ago

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Index: tools/metrics/histograms/histograms.xml

diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml

index 7018035bfe891e9a33e4124264a1c0f14ba56b88..d988f00e64654bff7dd840124b5bc164ead98444 100644

--- a/tools/metrics/histograms/histograms.xml

+++ b/tools/metrics/histograms/histograms.xml

@@ -10081,6 +10081,17 @@ other types of suffix sets.

</summary>

</histogram>

+<histogram name="NewTabPage.ThumbnailFallbackRate" units="%">

+ <summary>

+ The percentage of times most visited tiles use the fallback thumbnail. Only

+ requests that actually specify a fallback thumbnail are considered here. We

+ measure the rate instead of the number of errors because multiple attempts

+ are made to load thumbnails at different times during the NTP's lifetime.

+ Each NTP session's error rate is logged after the user navigates to a new

+ URL from that NTP.

+ </summary>

+</histogram>

The number of screenshots that were cached for the visible suggestions on

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