Roll src/ios/third_party/material_components_ios/src/ 4bcf88708..6543af21b (7 commits)

TBR=bling-team@google.com

Change-Id: I83ba4498f2001e0adb3229420f084ff3511c2ac8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2407196Reviewed-by: Internal Frameworks Autoroller <bling-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Internal Frameworks Autoroller <bling-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#806442}

DEPS

@@ -545,7 +545,7 @@ deps = {
   },
 
   'src/ios/third_party/material_components_ios/src': {
-      'url': Var('chromium_git') + '/external/github.com/material-components/material-components-ios.git' + '@' + '4bcf88708b46a38db2f9d695a8e44e0b744ba7ba',
+      'url': Var('chromium_git') + '/external/github.com/material-components/material-components-ios.git' + '@' + '6543af21be74965abb609e792d744f8f76fe4c63',
       'condition': 'checkout_ios',
   },