Move more web widgets painting from webkit to chrome.

gfx/color_utils.cc

 // Copyright (c) 2010 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 "gfx/color_utils.h"
 
 #include <math.h>
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
@@ skipping 127 matching lines @@
   double temp2 = (lightness < 0.5) ?
       (lightness * (1.0 + saturation)) :
       (lightness + saturation - (lightness * saturation));
   double temp1 = 2.0 * lightness - temp2;
   return SkColorSetARGB(alpha,
       static_cast<int>(calcHue(temp1, temp2, hue + 1.0 / 3.0) * 255),
       static_cast<int>(calcHue(temp1, temp2, hue) * 255),
       static_cast<int>(calcHue(temp1, temp2, hue - 1.0 / 3.0) * 255));
 }
 
+SkColor BrightenColor(const HSL& hsl, SkAlpha alpha, double lightness_amount) {

[tony, 2011/01/14 22:06:04]

Can we just use HSLShift for this?  It's a little different, so maybe it'll
force us to rebaseline a lot of tests.  If that's a lot of tests, I would just
move this method into native_theme_linux.*.  This method doesn't seem like it'll
be used outside that file.

[xiyuan, 2011/01/18 21:30:49]

Done. Moved it into native_theme_linux.

+  HSL adjusted = hsl;
+  adjusted.l += lightness_amount;
+  if (adjusted.l > 1.0)
+    adjusted.l = 1.0;
+  if (adjusted.l < 0.0)
+    adjusted.l = 0.0;
+
+  return HSLToSkColor(adjusted, alpha);
+}
+
 SkColor HSLShift(SkColor color, const HSL& shift) {
   HSL hsl;
   int alpha = SkColorGetA(color);
   SkColorToHSL(color, &hsl);
 
   // Replace the hue with the tint's hue.
   if (shift.h >= 0)
     hsl.h = shift.h;
 
   // Change the saturation.
@@ skipping 133 matching lines @@
 SkColor GetSysSkColor(int which) {
 #if defined(OS_WIN)
   return skia::COLORREFToSkColor(GetSysColor(which));
 #else
   NOTIMPLEMENTED();
   return SK_ColorLTGRAY;
 #endif
 }
 
 }  // namespace color_utils