Add support for painting halos on Views Labels.

ui/views/controls/label.h

 // 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.
 
 #ifndef UI_VIEWS_CONTROLS_LABEL_H_
 #define UI_VIEWS_CONTROLS_LABEL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 82 matching lines @@
 
   // Sets the drop shadow's offset from the text.
   void SetShadowOffset(int x, int y);
 
   // Sets the shadow blur. Default is zero.
   void set_shadow_blur(double shadow_blur) { shadow_blur_ = shadow_blur; }
 
   // Disables shadows.
   void ClearEmbellishing();
 
+  // Set the color of a halo on the painted text (use transparent for none).
+  void set_halo_color(SkColor halo_color) { halo_color_ = halo_color; }
+
   // Sets horizontal alignment. If the locale is RTL, and the directionality
   // mode is USE_UI_DIRECTIONALITY, the alignment is flipped around.
   //
   // Caveat: for labels originating from a web page, the directionality mode
   // should be reset to AUTO_DETECT_DIRECTIONALITY before the horizontal
   // alignment is set. Otherwise, the label's alignment specified as a parameter
   // will be flipped in RTL locales.
   void SetHorizontalAlignment(gfx::HorizontalAlignment alignment);
 
   gfx::HorizontalAlignment horizontal_alignment() const {
@@ skipping 150 matching lines @@
   SkColor background_color_;
 
   // Set to true once the corresponding setter is invoked.
   bool enabled_color_set_;
   bool disabled_color_set_;
   bool background_color_set_;
 
   bool auto_color_readability_;
   mutable gfx::Size text_size_;
   mutable bool text_size_valid_;
-  // Indicates the level of shadow blurring. Default is zero.
-  double shadow_blur_;
   int line_height_;
   bool is_multi_line_;
   bool is_obscured_;
   bool allow_character_break_;
   ElideBehavior elide_behavior_;
   gfx::HorizontalAlignment horizontal_alignment_;
   base::string16 tooltip_text_;
   // Whether to collapse the label when it's not visible.
   bool collapse_when_hidden_;
   // The following member variable is used to control whether the
   // directionality is auto-detected based on first strong directionality
   // character or is determined by chrome UI's locale.
   DirectionalityMode directionality_mode_;
 
   // Colors for shadow.
   SkColor enabled_shadow_color_;
   SkColor disabled_shadow_color_;
 
   // Space between text and shadow.
   gfx::Point shadow_offset_;
 
   // Should a shadow be drawn behind the text?
   bool has_shadow_;
 
+  // Indicates the level of shadow blurring. Default is zero.
+  double shadow_blur_;
+
+  // The halo color drawn around the text if it is not transparent.
+  SkColor halo_color_;
+
   // The cached heights to avoid recalculation in GetHeightForWidth().
   mutable std::vector<gfx::Size> cached_heights_;
   mutable int cached_heights_cursor_;
 
   DISALLOW_COPY_AND_ASSIGN(Label);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_LABEL_H_