ash uber tray: Make the tray background rounded.

ash/system/tray/system_tray.cc

Index: ash/system/tray/system_tray.cc
diff --git a/ash/system/tray/system_tray.cc b/ash/system/tray/system_tray.cc
index 89e421b56781c9715a17fc025ef82274aa32b27c..cef7f3525676a693dc6eacd3c752b221b4679a87 100644
--- a/ash/system/tray/system_tray.cc
+++ b/ash/system/tray/system_tray.cc
@@ -18,6 +18,7 @@
 #include "third_party/skia/include/core/SkPaint.h"
 #include "third_party/skia/include/core/SkPath.h"
 #include "ui/gfx/canvas.h"
+#include "ui/gfx/skia_util.h"
 #include "ui/views/border.h"
 #include "ui/views/bubble/bubble_delegate.h"
 #include "ui/views/controls/label.h"
@@ -38,6 +39,8 @@ const SkColor kLightColor = SkColorSetRGB(240, 240, 240);
 const SkColor kBackgroundColor = SK_ColorWHITE;
 const SkColor kShadowColor = SkColorSetARGB(25, 0, 0, 0);
 
+const SkColor kTrayBackgroundColor = SkColorSetARGB(127, 0, 0, 0);
+
 class SystemTrayBubbleBackground : public views::Background {
  public:
   explicit SystemTrayBubbleBackground(views::View* owner)
@@ -194,6 +197,28 @@ class SystemTrayBubble : public views::BubbleDelegateView {
   DISALLOW_COPY_AND_ASSIGN(SystemTrayBubble);
 };
 
+class SystemTrayBackground : public views::Background {
+ public:
+  SystemTrayBackground() {}
+  virtual ~SystemTrayBackground() {}
+
+ private:
+  // Overrridden from views::Background.
+  virtual void Paint(gfx::Canvas* canvas, views::View* view) const OVERRIDE {
+    SkPaint paint;
+    paint.setAntiAlias(true);
+    paint.setStyle(SkPaint::kFill_Style);
+    paint.setColor(kTrayBackgroundColor);
+    SkPath path;
+    gfx::Rect bounds(view->GetContentsBounds());
+    SkScalar radius = SkIntToScalar(4);
+    path.addRoundRect(gfx::RectToSkRect(bounds), radius, radius);
+    canvas->GetSkCanvas()->drawPath(path, paint);
+  }
+
+  DISALLOW_COPY_AND_ASSIGN(SystemTrayBackground);
+};
+
 }  // namespace
 
 namespace ash {
@@ -203,8 +228,7 @@ SystemTray::SystemTray()
       popup_(NULL) {
   SetLayoutManager(new views::BoxLayout(views::BoxLayout::kHorizontal,
       5, 0, 3));
-  set_background(views::Background::CreateSolidBackground(
-      SkColorSetARGB(127, 0, 0, 0)));
+  set_background(new SystemTrayBackground);
 }
 
 SystemTray::~SystemTray() {