Fix yet another convexicator issue

tests/PathTest.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkCanvas.h"
 #include "SkPaint.h"
 #include "SkParse.h"
@@ skipping 1188 matching lines @@
     // http://crbug.com/412640
     SkPath degenerateConcave;
     degenerateConcave.moveTo(148.67912f, 191.875f);
     degenerateConcave.lineTo(470.37695f, 7.5f);
     degenerateConcave.lineTo(148.67912f, 191.875f);
     degenerateConcave.lineTo(41.446522f, 376.25f);
     degenerateConcave.lineTo(-55.971577f, 460.0f);
     degenerateConcave.lineTo(41.446522f, 376.25f);
     check_convexity(reporter, degenerateConcave, SkPath::kConcave_Convexity);
     check_direction(reporter, degenerateConcave, SkPath::kUnknown_Direction);
+
+    // http://crbug.com/433683
+    SkPath badFirstVector;
+    badFirstVector.moveTo(501.087708f, 319.610352f);
+    badFirstVector.lineTo(501.087708f, 319.610352f);
+    badFirstVector.cubicTo(501.087677f, 319.610321f, 449.271606f, 258.078674f, 395.084564f, 198.711182f);
+    badFirstVector.cubicTo(358.967072f, 159.140717f, 321.910553f, 120.650436f, 298.442322f, 101.955399f);
+    badFirstVector.lineTo(301.557678f, 98.044601f);
+    badFirstVector.cubicTo(325.283844f, 116.945084f, 362.615204f, 155.720825f, 398.777557f, 195.340454f);
+    badFirstVector.cubicTo(453.031860f, 254.781662f, 504.912262f, 316.389618f, 504.912292f, 316.389648f);
+    badFirstVector.lineTo(504.912292f, 316.389648f);
+    badFirstVector.lineTo(501.087708f, 319.610352f);
+    badFirstVector.close();
+    check_convexity(reporter, badFirstVector, SkPath::kConcave_Convexity);
 }
 
 static void check_convex_bounds(skiatest::Reporter* reporter, const SkPath& p,
                                 const SkRect& bounds) {
     REPORTER_ASSERT(reporter, p.isConvex());
     REPORTER_ASSERT(reporter, p.getBounds() == bounds);
 
     SkPath p2(p);
     REPORTER_ASSERT(reporter, p2.isConvex());
     REPORTER_ASSERT(reporter, p2.getBounds() == bounds);
@@ skipping 2408 matching lines @@
     test_addEmptyPath(reporter, SkPath::kExtend_AddPathMode);
     test_addEmptyPath(reporter, SkPath::kAppend_AddPathMode);
     test_conicTo_special_case(reporter);
     test_get_point(reporter);
     test_contains(reporter);
     PathTest_Private::TestPathTo(reporter);
     PathRefTest_Private::TestPathRef(reporter);
     test_dump(reporter);
     test_path_crbugskia2820(reporter);
 }