Trace LayoutObject src attributes and parent frames

Trace LayoutObject src attributes and parent frames

Put Users First team is working on TBMv2 ads metrics.
The first prototype of these metrics will use the layout tree snapshots
in traces to find ads' sizes and positions. The positions can be compared
with the viewport to find when the ads are on-screen.

Currently, the layout tree snapshots indicate every layout object's size,
position, and type, so we can find iframes and their sizes, but we can't tell if
those iframes are ads.

Catapult has a list of a few known ad networks domains, so if TracedLayoutObject
traced the 'src' attribute for iframe LayoutObjects, then catapult would be able
to tell which iframes are ads.

Since snapshotting LayoutTrees is fairly costly, we don't expect to be able to
implement UMA using them. We are exploring more efficient methods of computing
these metrics while we experiment with computing them in the easy-to-write way
using traces.

Catapult change: https://codereview.chromium.org/1911603002

BUG=597851
CQ_EXTRA_TRYBOTS=tryserver.chromium.perf:android_s5_perf_cq;tryserver.chromium.perf:winx64_10_perf_cq;tryserver.chromium.perf:mac_retina_perf_cq;tryserver.chromium.perf:linux_perf_cq

[benjhayden, 2016-04-07 15:07:03]

Description was changed from

==========
Trace LayoutObject src attributes and parent frames
==========

to

==========
Trace LayoutObject src attributes and parent frames

Put Users First team is working on TBMv2 ads metrics.
The first prototype of these metrics will use the layout tree snapshots
in traces to find ads' sizes and positions. The positions can be compared
with the viewport to find when the ads are on-screen.

Currently, the layout tree snapshots indicate every layout object's size,
position, and type, so we can find iframes and their sizes, but we can't tell if
those iframes are ads.

Catapult has a list of a few known ad networks domains, so if TracedLayoutObject
traced the 'src' attribute for iframe LayoutObjects, then catapult would be able
to tell which iframes are ads.

Since snapshotting LayoutTrees is fairly costly, we don't expect to be able to
implement UMA using them. We are exploring more efficient methods of computing
these metrics while we experiment with computing them in the easy-to-write way
using traces.

BUG=597851
==========

[benjhayden, 2016-04-22 17:15:05]

Description was changed from

==========
Trace LayoutObject src attributes and parent frames

Put Users First team is working on TBMv2 ads metrics.
The first prototype of these metrics will use the layout tree snapshots
in traces to find ads' sizes and positions. The positions can be compared
with the viewport to find when the ads are on-screen.

Currently, the layout tree snapshots indicate every layout object's size,
position, and type, so we can find iframes and their sizes, but we can't tell if
those iframes are ads.

Catapult has a list of a few known ad networks domains, so if TracedLayoutObject
traced the 'src' attribute for iframe LayoutObjects, then catapult would be able
to tell which iframes are ads.

Since snapshotting LayoutTrees is fairly costly, we don't expect to be able to
implement UMA using them. We are exploring more efficient methods of computing
these metrics while we experiment with computing them in the easy-to-write way
using traces.

BUG=597851
==========

to

==========
Trace LayoutObject src attributes and parent frames

Put Users First team is working on TBMv2 ads metrics.
The first prototype of these metrics will use the layout tree snapshots
in traces to find ads' sizes and positions. The positions can be compared
with the viewport to find when the ads are on-screen.

Currently, the layout tree snapshots indicate every layout object's size,
position, and type, so we can find iframes and their sizes, but we can't tell if
those iframes are ads.

Catapult has a list of a few known ad networks domains, so if TracedLayoutObject
traced the 'src' attribute for iframe LayoutObjects, then catapult would be able
to tell which iframes are ads.

Since snapshotting LayoutTrees is fairly costly, we don't expect to be able to
implement UMA using them. We are exploring more efficient methods of computing
these metrics while we experiment with computing them in the easy-to-write way
using traces.

BUG=597851
CQ_EXTRA_TRYBOTS=tryserver.chromium.perf:android_s5_perf_cq;tryserver.chromium.perf:winx64_10_perf_cq;tryserver.chromium.perf:mac_retina_perf_cq;tryserver.chromium.perf:linux_perf_cq
==========

[benjhayden, 2016-04-22 20:28:45]

Description was changed from

==========
Trace LayoutObject src attributes and parent frames

Put Users First team is working on TBMv2 ads metrics.
The first prototype of these metrics will use the layout tree snapshots
in traces to find ads' sizes and positions. The positions can be compared
with the viewport to find when the ads are on-screen.

Currently, the layout tree snapshots indicate every layout object's size,
position, and type, so we can find iframes and their sizes, but we can't tell if
those iframes are ads.

Catapult has a list of a few known ad networks domains, so if TracedLayoutObject
traced the 'src' attribute for iframe LayoutObjects, then catapult would be able
to tell which iframes are ads.

Since snapshotting LayoutTrees is fairly costly, we don't expect to be able to
implement UMA using them. We are exploring more efficient methods of computing
these metrics while we experiment with computing them in the easy-to-write way
using traces.

BUG=597851
CQ_EXTRA_TRYBOTS=tryserver.chromium.perf:android_s5_perf_cq;tryserver.chromium.perf:winx64_10_perf_cq;tryserver.chromium.perf:mac_retina_perf_cq;tryserver.chromium.perf:linux_perf_cq
==========

to

==========
Trace LayoutObject src attributes and parent frames

Put Users First team is working on TBMv2 ads metrics.
The first prototype of these metrics will use the layout tree snapshots
in traces to find ads' sizes and positions. The positions can be compared
with the viewport to find when the ads are on-screen.

Currently, the layout tree snapshots indicate every layout object's size,
position, and type, so we can find iframes and their sizes, but we can't tell if
those iframes are ads.

Catapult has a list of a few known ad networks domains, so if TracedLayoutObject
traced the 'src' attribute for iframe LayoutObjects, then catapult would be able
to tell which iframes are ads.

Since snapshotting LayoutTrees is fairly costly, we don't expect to be able to
implement UMA using them. We are exploring more efficient methods of computing
these metrics while we experiment with computing them in the easy-to-write way
using traces.

Catapult change: https://codereview.chromium.org/1911603002

BUG=597851
CQ_EXTRA_TRYBOTS=tryserver.chromium.perf:android_s5_perf_cq;tryserver.chromium.perf:winx64_10_perf_cq;tryserver.chromium.perf:mac_retina_perf_cq;tryserver.chromium.perf:linux_perf_cq
==========

[benjhayden, 2016-06-03 18:12:29]

https://codereview.chromium.org/1864403003/diff/100001/third_party/WebKit/Sou...
File third_party/WebKit/Source/core/frame/FrameView.cpp (right):

https://codereview.chromium.org/1864403003/diff/100001/third_party/WebKit/Sou...
third_party/WebKit/Source/core/frame/FrameView.cpp:1038:
TRACE_EVENT_OBJECT_SNAPSHOT_WITH_ID(TRACE_DISABLED_BY_DEFAULT("blink.debug.layout"),
"LayoutTree",
comment out for puf

https://codereview.chromium.org/1864403003/diff/100001/third_party/WebKit/Sou...
File third_party/WebKit/Source/core/layout/TracedLayoutObject.cpp (right):

https://codereview.chromium.org/1864403003/diff/100001/third_party/WebKit/Sou...
third_party/WebKit/Source/core/layout/TracedLayoutObject.cpp:39: Element&
element = toElement(*node);
tracedValue->setString("originURL", element.originURL());
if (node->nodeName() == "A") tracedValue->setString("href",
element.getAttribute("href"));