Adding fading effect for paint rectangles in HUD.

cc/debug/debug_colors.h

Index: cc/debug/debug_colors.h
diff --git a/cc/debug/debug_colors.h b/cc/debug/debug_colors.h
index 2c35c4aabb7413573d47830ccc7941ac9a15ce14..96de7565ae18d21805e5c9969595ceb5cfde654f 100644
--- a/cc/debug/debug_colors.h
+++ b/cc/debug/debug_colors.h
@@ -69,9 +69,10 @@ class DebugColors {
   static SkColor EvictedTileCheckerboardColor();
   static SkColor InvalidatedTileCheckerboardColor();
 
-  static SkColor PaintRectBorderColor();
+  static const int kFadeSteps = 50;

[caseq, 2014/03/06 12:40:04]

why is this still signed?

[danakj, 2014/03/06 19:03:21]

Chromium style guide says to use signed ints and DCHECKs rather than unsigned
things except for stuff like size_t for array sizes.

+  static SkColor PaintRectBorderColor(unsigned step);

[danakj, 2014/03/06 19:03:21]

so these should really be int, sorry.

   static int PaintRectBorderWidth();
-  static SkColor PaintRectFillColor();
+  static SkColor PaintRectFillColor(unsigned step);
 
   static SkColor PropertyChangedRectBorderColor();
   static int PropertyChangedRectBorderWidth();