Add support for drawing window caption buttons on windows.

ui/native_theme/native_theme_base.cc

 // 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.
 
 #include "ui/native_theme/native_theme_base.h"
 
 #include <limits>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 132 matching lines @@
       // These sizes match the sizes in Chromium Win.
       return gfx::Size(kSliderThumbWidth, kSliderThumbHeight);
     case kTabPanelBackground:
       NOTIMPLEMENTED();
       break;
     case kTextField:
       return gfx::Size();  // No default size.
     case kTrackbarThumb:
     case kTrackbarTrack:
     case kWindowResizeGripper:
+    case kCaptionMin:
+    case kCaptionMax:
+    case kCaptionRestore:
+    case kCaptionClose:
       NOTIMPLEMENTED();
       break;
     default:
       NOTREACHED() << "Unknown theme part: " << part;
       break;
   }
   return gfx::Size();
 }
 
 void NativeThemeBase::PaintStateTransition(SkCanvas* canvas,
@@ skipping 92 matching lines @@
       break;
     case kTabPanelBackground:
       NOTIMPLEMENTED();
       break;
     case kTextField:
       PaintTextField(canvas, state, rect, extra.text_field);
       break;
     case kTrackbarThumb:
     case kTrackbarTrack:
     case kWindowResizeGripper:
+    case kCaptionMin:
+    case kCaptionMax:
+    case kCaptionRestore:
+    case kCaptionClose:
       NOTIMPLEMENTED();
       break;
     default:
       NOTREACHED() << "Unknown theme part: " << part;
       break;
   }
 
   canvas->restore();
 }
 
@@ skipping 757 matching lines @@
   SkScalar min_diff = Clamp((hsv1[1] + hsv2[1]) * 1.2f, 0.28f, 0.5f);
   SkScalar diff = Clamp(fabs(hsv1[2] - hsv2[2]) / 2, min_diff, 0.5f);
 
   if (hsv1[2] + hsv2[2] > 1.0)
     diff = -diff;
 
   return SaturateAndBrighten(hsv2, -0.2f, diff);
 }
 
 }  // namespace ui