Indicate focused state on text buttons with blue outline.

ui/base/native_theme/native_theme_base.cc

Index: ui/base/native_theme/native_theme_base.cc
diff --git a/ui/base/native_theme/native_theme_base.cc b/ui/base/native_theme/native_theme_base.cc
index a44c59e0aec60ba7e3178858863e4e1714a9cf6c..0d80718591a61d8c4f682b9c27e51d5308c0db8d 100644
--- a/ui/base/native_theme/native_theme_base.cc
+++ b/ui/base/native_theme/native_theme_base.cc
@@ -531,10 +531,13 @@ void NativeThemeBase::PaintButton(SkCanvas* canvas,
   paint.setShader(NULL);
 
   if (button.has_border) {
-    const int kBorderAlpha = state == kHovered ? 0x80 : 0x55;
+    const int kBorderAlpha = button.is_focused ? 0xff :
+        state == kHovered ? 0x80 : 0x55;

[tony, 2012/06/04 19:20:45]

Nit: Nested ternary operators are hard to read.  Can we use an 'if' for the
is_focused check?  You could merge it with the if below.

[flackr, 2012/06/05 14:13:18]

Done.

+    if (button.is_focused)
+      paint.setColor(GetSystemColor(kColorId_FocusedBorderColor));
     paint.setStyle(SkPaint::kStroke_Style);
     paint.setStrokeWidth(SkIntToScalar(1));
-    paint.setARGB(kBorderAlpha, 0, 0, 0);
+    paint.setAlpha(kBorderAlpha);
     skrect.inset(SkFloatToScalar(.5f), SkFloatToScalar(.5f));
     canvas->drawRoundRect(skrect, SkIntToScalar(1), SkIntToScalar(1), paint);
   }