Roll text-fragments-polyfill lib to v2.0.0

Greatly improves robustness of fragment generation

Bug: 1136043
Change-Id: Ic424fc2548bc773c049e973c967d0152489ff765
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2521104
Commit-Queue: Tommy Martino <tmartino@chromium.org>
Reviewed-by: sebsg <sebsg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#824667}

DEPS

@@ -1428,7 +1428,7 @@ deps = {
     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' + '@' + '25a1809c179748f854f4bf0d8f9e47bc2646f5ed',
+    'url': Var('chromium_git') + '/external/github.com/GoogleChromeLabs/text-fragments-polyfill.git' + '@' + '8e7110bf0aab9096e1bbad809d233d25b3b70e8f',
     'condition': 'checkout_ios',
   },