Force --enable-webkit-text-subpixel-positioning for DSF > 1.0.

ui/gfx/font_render_params_linux.cc

Index: ui/gfx/font_render_params_linux.cc
diff --git a/ui/gfx/font_render_params_linux.cc b/ui/gfx/font_render_params_linux.cc
index ed338d66cbcbc46f553d1afd3ec22bd40a0127a1..a3fb63b97008d4dd1ce50952d4804dbd4cd380a9 100644
--- a/ui/gfx/font_render_params_linux.cc
+++ b/ui/gfx/font_render_params_linux.cc
@@ -250,11 +250,7 @@ FontRenderParams GetFontRenderParams(const FontRenderParamsQuery& query,
   } else {
     // Fontconfig doesn't support configuring subpixel positioning; check a
     // flag.

[Daniel Erat, 2015/03/20 23:51:50]

please delete this now-obsolete comment.

[stapelberg, 2015/03/31 18:11:57]

Done.

-    params.subpixel_positioning =
-        actual_query.for_web_contents
-            ? base::CommandLine::ForCurrentProcess()->HasSwitch(
-                  switches::kEnableWebkitTextSubpixelPositioning)

[Daniel Erat, 2015/03/20 23:51:50]

this looks like it was the only place where this flag was used, so please remove
the other three references to the constant from chrome as well.

[stapelberg, 2015/03/31 18:11:57]

Done.

-            : actual_query.device_scale_factor > 1.0f;
+    params.subpixel_positioning = actual_query.device_scale_factor > 1.0f;
 
     // To enable subpixel positioning, we need to disable hinting.
     if (params.subpixel_positioning)