(Views only) Add a gradient background to the tabstrip of the view tabbed pane implementation.

ui/views/background.h

Index: ui/views/background.h
diff --git a/ui/views/background.h b/ui/views/background.h
index 17704910dcfa7e647c6ef95c56cf95f7308791d5..43f4d78bdf10abb97ff5eb95aeb881cb0e6049f7 100644
--- a/ui/views/background.h
+++ b/ui/views/background.h
@@ -59,6 +59,12 @@ class VIEWS_EXPORT Background {
   static Background* CreateVerticalGradientBackground(SkColor color1,
                                                       SkColor color2);
 
+  // Creates a background that contains a vertical gradient that varies from
+  // |color1| to |color2|. |start| and |end| specify the start and the end of
+  // the gradient. Both values are specified as percentage.

[msw, 2012/08/08 17:12:20]

nit: consider "Both |start| and |end| range from 0 (top) to 1 (bottom)."

[markusheintz_, 2012/08/08 21:53:55]

obsolete

+  static Background* CreateVerticalGradientRangeBackground(
+      SkColor color1, SkColor color2, float start, float end);

[msw, 2012/08/08 17:12:20]

nit: one param per line

[markusheintz_, 2012/08/08 21:53:55]

Done.

+
   // Creates Chrome's standard panel background
   static Background* CreateStandardPanelBackground();