Adding text-fragments-polyfill to //third-party

Bug: 1099268
Change-Id: I1e279858e48f65d1b842caa9943777f50aadc9b3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2332840Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Reviewed-by: Christopher Thompson <cthomp@chromium.org>
Commit-Queue: Tommy Martino <tmartino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#796483}

DEPS

@@ -1400,6 +1400,11 @@ deps = {
   'src/third_party/swiftshader':
     Var('swiftshader_git') + '/SwiftShader.git' + '@' +  Var('swiftshader_revision'),
 
+  'src/third_party/text-fragments-polyfill/src': {
+    'url': Var('chromium_git') + '/external/github.com/GoogleChromeLabs/text-fragments-polyfill.git' + '@' + 'f12d4cb5c2fe4d106d8310603c8481a732daaa40',
+    'condition': 'checkout_ios',
+  },
+
   'src/third_party/turbine': {
       'packages': [
           {

third_party/.gitignore

@@ -217,6 +217,7 @@
 /swiftshader/
 /syzygy
 /syzygy/binaries
+/text-fragments-polyfill/src
 /tint/src
 /tsan/
 /turbine/src

third_party/text-fragments-polyfill/OWNERS

+tmartino@chromium.org
+sebsg@chromium.org  # back-up

third_party/text-fragments-polyfill/README.chromium

+Name: Text Fragments Polyfill
+Short Name: text-fragments-polyfill
+URL: https://github.com/GoogleChromeLabs/text-fragments-polyfill
+Version: 0.0.7
+License: Apache 2.0
+License File: ./LICENSE
+Security Critical: yes
+CPEPrefix: unknown
+
+Description:
+This library implements the Text Fragments draft spec[1] in JavaScript. This
+spec accepts URLs with fragments indicating text to be highlighted and scrolled
+into view once the page has been loaded.
+(e.g.: foo.com/bar#:~:text=example%20highlighted%20text)
+
+This functionality is implemented in Blink on Android and Desktop; on iOS, we
+instead rely on injecting this JavaScript implementation. The library is
+maintained by Chromium committers & DevRel; it ships on GitHub because it is
+shared with an extension and a polyfill.
+
+[1]: https://wicg.github.io/scroll-to-text-fragment/
+
+Local Modifications:
+none