[Views] Adjust secondary info style colors for MD2

Source: https://docs.google.com/presentation/d/1EO7TOpIMJ7QHjaTVw9St-q6naKwtXX2TwzMirG5EsKY/edit#slide=id.g399d5e0d81_22_0

This is a partial reland of https://crrev.com/c/1099560, reverted
because it broke contrast ratio for links on the bookmarks bar.

Bug: 852094
Change-Id: I968fc12dd5101993ac7473a246b9f73b8a39b1d8
Reviewed-on: https://chromium-review.googlesource.com/1108196Reviewed-by: Michael Wasserman <msw@chromium.org>
Commit-Queue: Fabio Tirelo <ftirelo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568935}

chrome/browser/ui/views/harmony/harmony_typography_provider.cc

@@ -196,7 +196,7 @@ SkColor HarmonyTypographyProvider::GetColor(const views::View& view,
     case STYLE_SECONDARY:
     case STYLE_EMPHASIZED_SECONDARY:
     case STYLE_HINT:
-      return SkColorSetRGB(0x75, 0x75, 0x75);
+      return gfx::kGoogleGrey700;
     case STYLE_RED:
       return gfx::kGoogleRed700;
     case STYLE_GREEN: