Indicate focused state on text buttons with blue outline.

ui/base/native_theme/native_theme_base.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/base/native_theme/native_theme_base.h"
 
 #include <limits>
 
 #include "base/logging.h"
 #include "grit/ui_resources_standard.h"
@@ skipping 469 matching lines @@
         rb.GetImageSkiaNamed(IDR_RADIO_ON) :
         rb.GetImageSkiaNamed(IDR_RADIO_OFF);
   }
 
   gfx::Rect bounds = rect.Center(gfx::Size(image->width(), image->height()));
   DrawBitmapInt(canvas, *image, 0, 0, image->width(), image->height(),
       bounds.x(), bounds.y(), bounds.width(), bounds.height());
 }
 
 void NativeThemeBase::PaintButton(SkCanvas* canvas,
-                                   State state,
-                                   const gfx::Rect& rect,
-                                   const ButtonExtraParams& button) const {
+                                  State state,
+                                  const gfx::Rect& rect,
+                                  const ButtonExtraParams& button) const {
   SkPaint paint;
   const int kRight = rect.right();
   const int kBottom = rect.bottom();
   SkRect skrect = SkRect::MakeLTRB(rect.x(), rect.y(), kRight, kBottom);
   SkColor base_color = button.background_color;
 
   color_utils::HSL base_hsl;
   color_utils::SkColorToHSL(base_color, &base_hsl);
 
   // Our standard gradient is from 0xdd to 0xf8. This is the amount of
@@ skipping 21 matching lines @@
       gradient_bounds, colors, NULL, 2, SkShader::kClamp_TileMode, NULL);
   paint.setStyle(SkPaint::kFill_Style);
   paint.setAntiAlias(true);
   paint.setShader(shader);
   shader->unref();
 
   canvas->drawRoundRect(skrect, SkIntToScalar(1), SkIntToScalar(1), paint);
   paint.setShader(NULL);
 
   if (button.has_border) {
-    const int kBorderAlpha = state == kHovered ? 0x80 : 0x55;
+    int border_alpha = state == kHovered ? 0x80 : 0x55;
+    if (button.is_focused) {
+      border_alpha = 0xff;
+      paint.setColor(GetSystemColor(kColorId_FocusedBorderColor));
+    }
     paint.setStyle(SkPaint::kStroke_Style);
     paint.setStrokeWidth(SkIntToScalar(1));
-    paint.setARGB(kBorderAlpha, 0, 0, 0);
+    paint.setAlpha(border_alpha);
     skrect.inset(SkFloatToScalar(.5f), SkFloatToScalar(.5f));
     canvas->drawRoundRect(skrect, SkIntToScalar(1), SkIntToScalar(1), paint);
   }
 }
 
 void NativeThemeBase::PaintTextField(SkCanvas* canvas,
                                      State state,
                                      const gfx::Rect& rect,
                                      const TextFieldExtraParams& text) const {
   // The following drawing code simulates the user-agent css border for
@@ skipping 358 matching lines @@
   SkScalar min_diff = Clamp((hsv1[1] + hsv2[1]) * 1.2f, 0.28f, 0.5f);
   SkScalar diff = Clamp(fabs(hsv1[2] - hsv2[2]) / 2, min_diff, 0.5f);
 
   if (hsv1[2] + hsv2[2] > 1.0)
     diff = -diff;
 
   return SaturateAndBrighten(hsv2, -0.2f, diff);
 }
 
 }  // namespace ui