GC::drawConvexPolygon() & friends cleanup

Source/core/paint/BoxPainter.cpp

 // Copyright 2014 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 "config.h"
 #include "core/paint/BoxPainter.h"
 
 #include "core/HTMLNames.h"
 #include "core/frame/Settings.h"
 #include "core/html/HTMLFrameOwnerElement.h"
@@ skipping 2092 matching lines @@
                     quad[2].x(),
                     quad[2].y() - innerBorder.radii().bottomRight().height()),
                 quad[2]);
         }
         break;
     }
 
     // If the border matches both of its adjacent sides, don't anti-alias the clip, and
     // if neither side matches, anti-alias the clip.
     if (firstEdgeMatches == secondEdgeMatches) {
-        graphicsContext->clipConvexPolygon(4, quad, !firstEdgeMatches);
+        graphicsContext->clipPolygon(4, quad, !firstEdgeMatches);
         return;
     }
 
     // If antialiasing settings for the first edge and second edge is different,
     // they have to be addressed separately. We do this by breaking the quad into
     // two parallelograms, made by moving quad[1] and quad[2].
     float ax = quad[1].x() - quad[0].x();
     float ay = quad[1].y() - quad[0].y();
     float bx = quad[2].x() - quad[1].x();
     float by = quad[2].y() - quad[1].y();
@@ skipping 11 matching lines @@
 
         r1 = (-ax * by + ay * bx) / (cx * by - cy * bx) + kExtendFill;
         r2 = (-cx * by + cy * bx) / (ax * by - ay * bx) + kExtendFill;
     }
 
     FloatPoint firstQuad[4];
     firstQuad[0] = quad[0];
     firstQuad[1] = quad[1];
     firstQuad[2] = FloatPoint(quad[3].x() + r2 * ax, quad[3].y() + r2 * ay);
     firstQuad[3] = quad[3];
-    graphicsContext->clipConvexPolygon(4, firstQuad, !firstEdgeMatches);
+    graphicsContext->clipPolygon(4, firstQuad, !firstEdgeMatches);
 
     FloatPoint secondQuad[4];
     secondQuad[0] = quad[0];
     secondQuad[1] = FloatPoint(quad[0].x() - r1 * cx, quad[0].y() - r1 * cy);
     secondQuad[2] = quad[2];
     secondQuad[3] = quad[3];
-    graphicsContext->clipConvexPolygon(4, secondQuad, !secondEdgeMatches);
+    graphicsContext->clipPolygon(4, secondQuad, !secondEdgeMatches);
 }
 
 } // namespace blink