Replace the term "main-frame" in content_settings.json.

Replace the term "main-frame" in content_settings.json.

Following the discussion about the term "main-frame" in https://codereview.chromium.org/843413003/, I experimented with a testing webpage that embedded <iframe>s which triggered different content setting requests.

Apparently, in the descriptions in content_settings.json, we used the term "main-frame" in two different contexts. This CL get rids of the term completely in favor of "top-level frame" and "document which requests X".

BUG=447978
Committed: https://crrev.com/6c9e3b3dd185d169364657a36a176b273b38e9e5
Cr-Commit-Position: refs/heads/master@{#313889}

[msramek, 2015-01-28 14:06:46]

Patchset #1 (id:1) has been deleted

[msramek, 2015-01-28 14:27:42]

Patchset #1 (id:20001) has been deleted

[msramek, 2015-01-28 14:37:41]

msramek@chromium.org changed reviewers:
+ bauerb@chromium.org, mkwst@chromium.org

[msramek, 2015-01-28 14:37:42]

Hi Mike and Bernhard,

Confused by your recent discussion on "main-frame", I tested all the settings
whose descriptions refer to that term; they seem to refer mostly to the
top-level frame, except notifications, where the actual document URL is
considered.

Could you please make check that I didn't mix it up?

Disclaimer: I just used the UI to set up exceptions. I didn't test the semantics
of secondary URL.

Thanks,
Martin

[Mike West, 2015-01-28 20:36:58]

LGTM, as I assume you did the research correctly. :)

Bernhard might have comments, however. Please wait for him to take a look.

[Bernhard Bauer, 2015-01-29 17:31:22]

lgtm

[msramek, 2015-01-30 09:26:56]

The CQ bit was checked by msramek@chromium.org

[commit-bot: I haz the power, 2015-01-30 09:27:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/883983003/40001

[commit-bot: I haz the power, 2015-01-30 09:31:04]

Committed patchset #1 (id:40001)

[commit-bot: I haz the power, 2015-01-30 09:31:56]

Patchset 1 (id:??) landed as
https://crrev.com/6c9e3b3dd185d169364657a36a176b273b38e9e5
Cr-Commit-Position: refs/heads/master@{#313889}