Reland of more zero-length changes for svg compatibility

gm/strokes.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 "gm.h"
 #include "SkPath.h"
 #include "SkRandom.h"
@@ skipping 66 matching lines @@
 private:
     typedef skiagm::GM INHERITED;
 };
 
 /* See
    https://code.google.com/p/chromium/issues/detail?id=422974          and
    http://jsfiddle.net/1xnku3sg/2/
  */
 class ZeroLenStrokesGM : public skiagm::GM {
     SkPath fMoveHfPath, fMoveZfPath, fDashedfPath, fRefPath[4];
+    SkPath fCubicPath, fQuadPath, fLinePath;
 protected:
     void onOnceBeforeDraw() override {
 
         SkAssertResult(SkParsePath::FromSVGString("M0,0h0M10,0h0M20,0h0", &fMoveHfPath));
         SkAssertResult(SkParsePath::FromSVGString("M0,0zM10,0zM20,0z", &fMoveZfPath));
         SkAssertResult(SkParsePath::FromSVGString("M0,0h25", &fDashedfPath));
+        SkAssertResult(SkParsePath::FromSVGString("M 0 0 C 0 0 0 0 0 0", &fCubicPath));
+        SkAssertResult(SkParsePath::FromSVGString("M 0 0 Q 0 0 0 0", &fQuadPath));
+        SkAssertResult(SkParsePath::FromSVGString("M 0 0 L 0 0", &fLinePath));
 
         for (int i = 0; i < 3; ++i) {
             fRefPath[0].addCircle(i * 10.f, 0, 5);
             fRefPath[1].addCircle(i * 10.f, 0, 10);
             fRefPath[2].addRect(i * 10.f - 4, -2, i * 10.f + 4, 6);
             fRefPath[3].addRect(i * 10.f - 10, -10, i * 10.f + 10, 10);
         }
     }
 
     SkString onShortName() override {
@@ skipping 30 matching lines @@
             canvas->drawPath(fRefPath[i * 2], fillPaint);
             strokePaint.setStrokeWidth(20);
             strokePaint.setAlpha(127);
             canvas->translate(0, 50);
             canvas->drawPath(fMoveHfPath, strokePaint);
             canvas->translate(0, 30);
             canvas->drawPath(fMoveZfPath, strokePaint);
             canvas->translate(0, 30);
             fillPaint.setAlpha(127);
             canvas->drawPath(fRefPath[1 + i * 2], fillPaint);
+            canvas->translate(0, 30);
+            canvas->drawPath(fCubicPath, strokePaint);
+            canvas->translate(0, 30);
+            canvas->drawPath(fQuadPath, strokePaint);
+            canvas->translate(0, 30);
+            canvas->drawPath(fLinePath, strokePaint);
             canvas->restore();
         }
     }
 
 private:
     typedef skiagm::GM INHERITED;
 };
 
 class Strokes2GM : public skiagm::GM {
     SkPath fPath;
@@ skipping 248 matching lines @@
 static skiagm::GM* F3(void*) { return new Strokes4GM; }
 static skiagm::GM* F4(void*) { return new Strokes5GM; }
 
 static skiagm::GMRegistry R0(F0);
 static skiagm::GMRegistry R1(F1);
 static skiagm::GMRegistry R2(F2);
 static skiagm::GMRegistry R3(F3);
 static skiagm::GMRegistry R4(F4);
 
 DEF_GM( return new ZeroLenStrokesGM; )