Support CNAME adblocking

[antonok-edm]

The API described in #7117 is primarily used by extensions to block resources that served from many different domains to circumvent traditional adblocking techniques. Similarly, Brave's most important use-case for the DNS resolution API is to integrate it with Shields.

Shields should block any network requests where either the original URL or that URL's canonical name (DNS CNAME record) matches any adblock rules.

Since our network blocking is done in C++ code, this doesn't necessarily need to be exposed as a Javascript API.

[LaurenWags]

Verified passed with

Brave | 1.17.63 Chromium: 87.0.4280.49 (Official Build) unknown (x86_64)
-- | --
Revision | f77f85899646b42a1d3c8ff36794e00becab9171-refs/branch-heads/4280@{#1115}
OS | macOS Version 10.14.6 (Build 18G6032)

Verified test plan from brave/brave-core#6640. Confirmed https://xxxx.mathon.fr/xxxxxxxxxxx.js listed in shields with above build. Confirmed https://static.criteo.net/js/ld/ld.js is not listed in shields on Network tab of Dev Tools.

Screenshots

---

Verified passed with

Brave	1.17.63 Chromium: 87.0.4280.49 (Official Build) dev (64-bit)
Revision	f77f85899646b42a1d3c8ff36794e00becab9171-refs/branch-heads/4280@{#1115}
OS	Windows 7 Service Pack 1 (Build 7601.24544)

Verified test plan from brave/brave-core#6640. Confirmed https://xxxx.mathon.fr/xxxxxxxxxxx.js listed in shields with above build. Confirmed https://static.criteo.net/js/ld/ld.js is not listed in shields on Network tab of Dev Tools.

Screenshots

---

Verification passed on

Brave	1.17.63 Chromium: 87.0.4280.49 (Official Build) dev (64-bit)
Revision	f77f85899646b42a1d3c8ff36794e00becab9171-refs/branch-heads/4280@{#1115}
OS	Ubuntu 18.04 LTS

Verified test plan from brave/brave-core#6640. Confirmed https://xxxx.mathon.fr/xxxxxxxxxxx.js listed in shields with above build. Confirmed https://static.criteo.net/js/ld/ld.js is not listed in shields on Network tab of Dev Tools.

Screenshots

 

[srirambv]

Verification passed on OnePlus 6T with Android 10 running 1.17.66 x64 beta build

• Verified https://xxxx.mathon.fr/xxxxxxxx.js is blocked
• Verified https://static.criteo.net/js/ld/ld.js is not listed
  

---

Verification passed on Samsung Tab A with Android 10 running 1.17.66 x64 beta build

• Verified https://xxxx.mathon.fr/xxxxxxxx.js is blocked
• Verified https://static.criteo.net/js/ld/ld.js is not listed