We should add UMA use counters for each visualViewport feature and for overall usage.
The following revision refers to this bug: https://chromium.googlesource.com/chromium/src.git/+/5c3cff9bbeeb19a81879ce59089ee0d2e950ce0e commit 5c3cff9bbeeb19a81879ce59089ee0d2e950ce0e Author: ymalik <ymalik@chromium.org> Date: Sun Jul 24 19:48:13 2016 Add UseCounters for ViewportAPI BUG= 629801 Review-Url: https://codereview.chromium.org/2174023002 Cr-Commit-Position: refs/heads/master@{#407391} [modify] https://crrev.com/5c3cff9bbeeb19a81879ce59089ee0d2e950ce0e/third_party/WebKit/Source/core/core.gypi [modify] https://crrev.com/5c3cff9bbeeb19a81879ce59089ee0d2e950ce0e/third_party/WebKit/Source/core/dom/Document.cpp [add] https://crrev.com/5c3cff9bbeeb19a81879ce59089ee0d2e950ce0e/third_party/WebKit/Source/core/events/VisualViewportResizeEvent.cpp [add] https://crrev.com/5c3cff9bbeeb19a81879ce59089ee0d2e950ce0e/third_party/WebKit/Source/core/events/VisualViewportResizeEvent.h [add] https://crrev.com/5c3cff9bbeeb19a81879ce59089ee0d2e950ce0e/third_party/WebKit/Source/core/events/VisualViewportScrollEvent.cpp [add] https://crrev.com/5c3cff9bbeeb19a81879ce59089ee0d2e950ce0e/third_party/WebKit/Source/core/events/VisualViewportScrollEvent.h [modify] https://crrev.com/5c3cff9bbeeb19a81879ce59089ee0d2e950ce0e/third_party/WebKit/Source/core/frame/UseCounter.h [modify] https://crrev.com/5c3cff9bbeeb19a81879ce59089ee0d2e950ce0e/third_party/WebKit/Source/core/frame/VisualViewport.idl [modify] https://crrev.com/5c3cff9bbeeb19a81879ce59089ee0d2e950ce0e/tools/metrics/histograms/histograms.xml
Comment 1 by ymalik@chromium.org
, Jul 22 2016