Rename: background_is_transparent -> subpixel_rendering_enabled

ui/views/controls/textfield/textfield.cc

Index: ui/views/controls/textfield/textfield.cc
diff --git a/ui/views/controls/textfield/textfield.cc b/ui/views/controls/textfield/textfield.cc
index 87b053e030ae3096e57f8a646563e4a9eaae25e8..b8cca0c1262e5327a5f5a90a4df7e9bdba8792f1 100644
--- a/ui/views/controls/textfield/textfield.cc
+++ b/ui/views/controls/textfield/textfield.cc
@@ -1648,7 +1648,8 @@ void Textfield::AccessibilitySetValue(const base::string16& new_value) {
 void Textfield::UpdateBackgroundColor() {
   const SkColor color = GetBackgroundColor();
   set_background(Background::CreateSolidBackground(color));
-  GetRenderText()->set_background_is_transparent(SkColorGetA(color) != 0xFF);
+  // Disable subpixel rendering when the background color is transparent.

[sky, 2015/02/19 17:51:03]

This comment documents what the code does. Useful comments tell you why the code
is like this. Why is it important that subpixel rendering is disabled when
transparent?

[Jun Mukai, 2015/02/19 18:54:33]

Done, also put the link to the reported bug.

+  GetRenderText()->set_subpixel_rendering_enabled(SkColorGetA(color) == 0xFF);
   SchedulePaint();
 }