Add flag to enable rendering of text using signed distance fields.

This change plumbs through a flag that turns on distance
field text in Skia when doing GPU rasterization, as requested
by [email protected].

BUG=368468

Review URL: https://codereview.chromium.org/266743003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@268758 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/content/renderer/render_thread_impl.h b/content/renderer/render_thread_impl.h
index beee381..ade85d4 100644
--- a/content/renderer/render_thread_impl.h
+++ b/content/renderer/render_thread_impl.h
@@ -216,6 +216,10 @@
 
   bool is_lcd_text_enabled() const { return is_lcd_text_enabled_; }
 
+  bool is_distance_field_text_enabled() const {
+    return is_distance_field_text_enabled_;
+  }
+
   bool is_zero_copy_enabled() const { return is_zero_copy_enabled_; }
 
   bool is_one_copy_enabled() const { return is_one_copy_enabled_; }
@@ -546,6 +550,7 @@
   bool is_impl_side_painting_enabled_;
   bool is_low_res_tiling_enabled_;
   bool is_lcd_text_enabled_;
+  bool is_distance_field_text_enabled_;
   bool is_zero_copy_enabled_;
   bool is_one_copy_enabled_;