cc: Use highp precision for texture coords if available and needed

cc/trees/layer_tree_settings.cc

Index: cc/trees/layer_tree_settings.cc
diff --git a/cc/trees/layer_tree_settings.cc b/cc/trees/layer_tree_settings.cc
index 757ab4af78c709fefd8932af316aa599d97b662d..31daa0c0d04bc3af5d533246fe149bd3776e7fe1 100644
--- a/cc/trees/layer_tree_settings.cc
+++ b/cc/trees/layer_tree_settings.cc
@@ -51,7 +51,8 @@ LayerTreeSettings::LayerTreeSettings()
       max_prepaint_tile_distance(4096),
       // At 256x256 tiles, 128 tiles cover an area of 2048x4096 pixels.
       max_tiles_for_interest_area(128),
-      max_unused_resource_memory_percentage(100) {
+      max_unused_resource_memory_percentage(100),
+      highp_threshold_min(0) {
   // TODO(danakj): Renable surface caching when we can do it more realiably.
   // crbug.com/170713
   cache_render_pass_contents = false;