Roll src/ios/third_party/material_roboto_font_loader_ios/src 4aa51e906e56..bc63eabbbd1e (4 commits)

https://chromium.googlesource.com/external/github.com/material-foundation/material-roboto-font-loader-ios/+log/4aa51e906e56..bc63eabbbd1e

git log 4aa51e906e56..bc63eabbbd1e --date=short --first-parent --format='%ad %ae %s'
2019-04-10 rsmoore@google.com Revert "Remove unneeded fonts and unhint others. (#17)" (#19)
2019-04-10 rsmoore@google.com Revert "Remove extra `self = [super init]`. (#15)" (#18)
2019-04-10 dmaclach@gmail.com Remove unneeded fonts and unhint others. (#17)
2019-04-10 ccrazy88@users.noreply.github.com Remove extra `self = [super init]`. (#15)

Created with:
  gclient setdep -r src/ios/third_party/material_roboto_font_loader_ios/src@bc63eabbbd1e

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/material-roboto-font-loader-ios-chromium
Please CC bling-p10-rolls@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

Cq-Include-Trybots: luci.chrome.try:ios-internal-mdc
Bug: None
Tbr: bling-p10-rolls@google.com
Change-Id: I9c7c13f415582f3d204c8246703cf320f31ad44b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2016866Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#734521}

DEPS

@@ -554,7 +554,7 @@ deps = {
   },
 
   'src/ios/third_party/material_roboto_font_loader_ios/src': {
-      'url': Var('chromium_git') + '/external/github.com/material-foundation/material-roboto-font-loader-ios.git' + '@' + '4aa51e906e5671c71d24e991f1f10d782a58409f',
+      'url': Var('chromium_git') + '/external/github.com/material-foundation/material-roboto-font-loader-ios.git' + '@' + 'bc63eabbbd1e14cee0779b05827e08db2e413553',
       'condition': 'checkout_ios',
   },