Roll dom_distiller_js and add UMA for word count for distilled pages.

Roll dom_distiller_js and add UMA for word count for distilled pages.

For every successfully distilled article a word count is
submitted to UMA.

The histogram ranges from 1->4000 words with 50 buckets.

Changes rolled in from the DOM Distiller repo:

bbf7c01 Add StatisticsInfo to DomDistillerResult proto for number of words.
fc1a5c1 treat non-breaking space as whitespace
de38c78 Expand usage of SimilarSiblingContentExpansion
444a55e reorder table tests
5ff895b add and fix missing tests to suite
970a419 Add SimilarSiblingContentExpansion
da76b1e add new table classification heuristic

BUG=417049
Committed: https://crrev.com/940e7511e50d7afbe62a1df985bec4d07739c73a
Cr-Commit-Position: refs/heads/master@{#296986}

[nyquist, 2014-09-25 18:47:01]

nyquist@chromium.org changed reviewers:
+ yfriedman@chromium.org

[nyquist, 2014-09-25 18:47:01]

yfriedman: PTAL

[nyquist, 2014-09-25 21:09:49]

nyquist@chromium.org changed reviewers:
+ isherman@chromium.org

[nyquist, 2014-09-25 21:09:50]

isherman: PTAL tools/metrics/histograms/histograms.xml

[Ilya Sherman, 2014-09-25 22:04:01]

LGTM % nits.

https://codereview.chromium.org/608583003/diff/1/tools/metrics/histograms/his...
File tools/metrics/histograms/histograms.xml (right):

https://codereview.chromium.org/608583003/diff/1/tools/metrics/histograms/his...
tools/metrics/histograms/histograms.xml:5116: +<histogram
name="DomDistiller.Statistics.WordCount">
Optional nit: Might be nice to add a units="words" attribute.

https://codereview.chromium.org/608583003/diff/1/tools/metrics/histograms/his...
tools/metrics/histograms/histograms.xml:5120: +    pages each page is counted
separately.
nit: "pages each page" -> "pages, each page"

[Yaron, 2014-09-26 00:35:22]

lgtm but this needs a dom_distiller_js roll

[nyquist, 2014-09-26 17:26:38]

https://codereview.chromium.org/608583003/diff/1/tools/metrics/histograms/his...
File tools/metrics/histograms/histograms.xml (right):

https://codereview.chromium.org/608583003/diff/1/tools/metrics/histograms/his...
tools/metrics/histograms/histograms.xml:5116: +<histogram
name="DomDistiller.Statistics.WordCount">
On 2014/09/25 22:04:01, Ilya Sherman wrote:
> Optional nit: Might be nice to add a units="words" attribute.

Done.

https://codereview.chromium.org/608583003/diff/1/tools/metrics/histograms/his...
tools/metrics/histograms/histograms.xml:5120: +    pages each page is counted
separately.
On 2014/09/25 22:04:01, Ilya Sherman wrote:
> nit: "pages each page" -> "pages, each page"

Done.

[nyquist, 2014-09-26 17:26:48]

The CQ bit was checked by nyquist@chromium.org

[commit-bot: I haz the power, 2014-09-26 17:27:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/608583003/20001

[commit-bot: I haz the power, 2014-09-26 18:34:28]

Committed patchset #2 (id:20001) as 03119e468d2e2ad66a2b2f60394f2cb8b3cbf2d5

[commit-bot: I haz the power, 2014-09-26 18:35:04]

Patchset 2 (id:??) landed as
https://crrev.com/940e7511e50d7afbe62a1df985bec4d07739c73a
Cr-Commit-Position: refs/heads/master@{#296986}