Support for distilling prior pages in an article.

Support for distilling prior pages in an article.

If distillation is triggered on a page other than the first page, the
distiller only distills the subsequent pages in the article. Add support
for distilling prior pages.
This only adds support to the C++ side, the javascript is still missing
the heuristic to figure out previous pages.

BUG=288015
TEST=Included.

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=251654

[shashi, 2014-02-15 00:21:10]

Depends on https://codereview.chromium.org/130543003/ to land.

[cjhopman, 2014-02-15 02:45:53]

lgtm

https://codereview.chromium.org/167963003/diff/50001/components/dom_distiller...
File components/dom_distiller/core/distiller.cc (right):

https://codereview.chromium.org/167963003/diff/50001/components/dom_distiller...
components/dom_distiller/core/distiller.cc:164: AddToDistillationQueue(page_num
- 1, prev_page_url);
nit: this could be done in the prev_page_url.is_valid() block above

[shashi, 2014-02-17 03:43:20]

https://chromiumcodereview.appspot.com/167963003/diff/50001/components/dom_di...
File components/dom_distiller/core/distiller.cc (right):

https://chromiumcodereview.appspot.com/167963003/diff/50001/components/dom_di...
components/dom_distiller/core/distiller.cc:164: AddToDistillationQueue(page_num
- 1, prev_page_url);
On 2014/02/15 02:45:53, cjhopman wrote:
> nit: this could be done in the prev_page_url.is_valid() block above

Done.

[shashi, 2014-02-17 03:43:23]

The CQ bit was checked by shashishekhar@chromium.org

[commit-bot: I haz the power, 2014-02-17 03:43:35]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/shashishekhar@chromium.org/167963003/2...

[shashi, 2014-02-17 03:47:13]

The CQ bit was unchecked by shashishekhar@chromium.org

[shashi, 2014-02-17 03:47:39]

The CQ bit was checked by shashishekhar@chromium.org

[commit-bot: I haz the power, 2014-02-17 03:47:46]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/shashishekhar@chromium.org/167963003/3...

[commit-bot: I haz the power, 2014-02-17 11:02:55]

Change committed as 251654