Avoid shadowing variabels in new font code

I'm trying to remove variable shadowing in some Chromium
code to maybe make the code a bit more robust, and two functions
in blink/platform/fonts/shaping used several instances of |i|.

Bug: 925310
Change-Id: I3e09f7772a7865ec7f73976a57af355070b6ad4f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1578538
Commit-Queue: Dominik Röttsches <drott@chromium.org>
Auto-Submit: Daniel Bratell <bratell@opera.com>
Reviewed-by: Dominik Röttsches <drott@chromium.org>
Cr-Commit-Position: refs/heads/master@{#653164}
2 files changed