[core] De-mutex GlyphAtlas and SpriteAtlas

 - Expose glyph and icon information to workers via message interface.
 - Glyph/SpriteAtlas track which tiles have outstanding requests
    and send messages to them when glyphs/icons become available.
 - Remove obsolete "updateSymbolDependentTiles" pathway
 - Symbol preparation for a tile now depends on all glyphs becoming
    available before it can start.
 - Start tracking individual icons needed for a tile, although we don't
    do anything with the information yet.
 - Introduce typedef for GlyphID

1 files changed, 0 insertions, 6 deletions

diff --git a/src/mbgl/style/source_impl.cpp b/src/mbgl/style/source_impl.cpp
index 356d420e19..9fabc54f7d 100644
--- a/src/mbgl/style/source_impl.cpp
+++ b/src/mbgl/style/source_impl.cpp
@@ -191,12 +191,6 @@ void Source::Impl::removeTiles() {
     }
 }
 
-void Source::Impl::updateSymbolDependentTiles() {
-    for (auto& pair : tiles) {
-        pair.second->symbolDependenciesChanged();
-    }
-}
-
 void Source::Impl::reloadTiles() {
     cache.clear();