Restore SkPath(const SkPath&) to copy the generation ID on Android.

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 "Test.h"
 #include "SkCanvas.h"
 #include "SkPaint.h"
 #include "SkPath.h"
 #include "SkParse.h"
 #include "SkParsePath.h"
 #include "SkPathEffect.h"
 #include "SkRandom.h"
 #include "SkReader32.h"
 #include "SkSize.h"
+#include "SkSurface.h"
+#include "SkTypes.h"
 #include "SkWriter32.h"
-#include "SkSurface.h"
 
 #if defined(WIN32)
     #define SUPPRESS_VISIBILITY_WARNING
 #else
     #define SUPPRESS_VISIBILITY_WARNING __attribute__((visibility("hidden")))
 #endif
 
 static SkSurface* new_surface(int w, int h) {
     SkImage::Info info = {
         w, h, SkImage::kPMColor_ColorType, SkImage::kPremul_AlphaType
     };
     return SkSurface::NewRaster(info);
 }
 
+static void test_android_specific_behavior(skiatest::Reporter* reporter) {
+#ifdef SK_BUILD_FOR_ANDROID
+    // Copy constructor should preserve generation ID, but assignment shouldn't.
+    SkPath original;
+    original.moveTo(0, 0);
+    original.lineTo(1, 1);
+    REPORTER_ASSERT(original.getGenerationID() > 0);
+
+    const SkPath copy(original);
+    REPORTER_ASSERT(copy.getGenerationID() == original.getGenerationID());
+
+    SkPath assign;
+    assign = original;
+    REPORTER_ASSERT(assign.getGenerationID() != original.getGenerationID());
+#endif
+}
+
 // This used to assert in the debug build, as the edges did not all line-up.
 static void test_bad_cubic_crbug234190() {
     SkPath path;
     path.moveTo(13.8509f, 3.16858f);
     path.cubicTo(-2.35893e+08f, -4.21044e+08f,
                  -2.38991e+08f, -4.26573e+08f,
                  -2.41016e+08f, -4.30188e+08f);
 
     SkPaint paint;
     paint.setAntiAlias(true);
@@ skipping 2399 matching lines @@
     test_isfinite(reporter);
     test_isfinite_after_transform(reporter);
     test_arb_round_rect_is_convex(reporter);
     test_arb_zero_rad_round_rect_is_rect(reporter);
     test_addrect_isfinite(reporter);
     test_tricky_cubic();
     test_clipped_cubic();
     test_crbug_170666();
     test_bad_cubic_crbug229478();
     test_bad_cubic_crbug234190();
+    test_android_specific_behavior(reporter);
 }
 
 #include "TestClassDef.h"
 DEFINE_TESTCLASS("Path", PathTestClass, TestPath)