Remove GraphicsContext::strokeArc, which is unused.

Source/core/platform/graphics/GraphicsContext.cpp

 /*
  * Copyright (C) 2003, 2004, 2005, 2006, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 1125 matching lines @@
 {
     if (paintingDisabled())
         return;
 
     SkRect rect = ellipse;
     SkPaint paint;
     platformContext()->setupPaintForFilling(&paint);
     platformContext()->drawOval(rect, paint);
 }
 
-void GraphicsContext::strokeArc(const IntRect& r, int startAngle, int angleSpan)
-{
-    if (paintingDisabled())
-        return;
-
-    SkPaint paint;
-    SkRect oval = r;
-    if (strokeStyle() == NoStroke) {
-        // Stroke using the fill color.
-        // TODO(brettw) is this really correct? It seems unreasonable.
-        platformContext()->setupPaintForFilling(&paint);
-        paint.setStyle(SkPaint::kStroke_Style);
-        paint.setStrokeWidth(WebCoreFloatToSkScalar(strokeThickness()));
-    } else
-        platformContext()->setupPaintForStroking(&paint, 0, 0);
-
-    // We do this before converting to scalar, so we don't overflow SkFixed.
-    startAngle = fastMod(startAngle, 360);
-    angleSpan = fastMod(angleSpan, 360);
-
-    SkPath path;
-    path.addArc(oval, SkIntToScalar(-startAngle), SkIntToScalar(-angleSpan));
-    platformContext()->drawPath(path, paint);
-}
-
 void GraphicsContext::strokePath(const Path& pathToStroke)
 {
     if (paintingDisabled() || pathToStroke.isEmpty())
         return;
 
     const SkPath& path = pathToStroke.skPath();
     SkPaint paint;
     platformContext()->setupPaintForStroking(&paint, 0, 0);
     platformContext()->drawPath(path, paint);
 }
@@ skipping 566 matching lines @@
     static const SkPMColor colors[] = {
         SkPreMultiplyARGB(0x60, 0xFF, 0x00, 0x00), // More transparent red
         SkPreMultiplyARGB(0x60, 0xC0, 0xC0, 0xC0)  // More transparent gray
     };
 
     return colors[index];
 }
 #endif
 
 }