Vector icons: fix R_MOVE_TO after CLOSE

ui/gfx/paint_vector_icon_unittest.cc

Index: ui/gfx/paint_vector_icon_unittest.cc
diff --git a/ui/gfx/paint_vector_icon_unittest.cc b/ui/gfx/paint_vector_icon_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6786bf12d0187affcaf2952c4352264efdd1f08e
--- /dev/null
+++ b/ui/gfx/paint_vector_icon_unittest.cc
@@ -0,0 +1,63 @@
+// Copyright 2017 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 "ui/gfx/paint_vector_icon.h"
+
+#include <gtest/gtest.h>
+#include <vector>
+
+#include "third_party/skia/include/core/SkCanvas.h"
+#include "third_party/skia/include/core/SkPath.h"
+#include "ui/gfx/canvas.h"
+#include "ui/gfx/vector_icon_types.h"
+
+namespace gfx {
+
+namespace {
+
+class MockCanvas : public SkCanvas {
+ public:
+  MockCanvas(int width, int height) : SkCanvas(width, height) {}
+
+  // SkCanvas overrides:
+  void onDrawPath(const SkPath& path, const SkPaint& paint) override {
+    paths_.push_back(path);
+  }
+
+  const std::vector<SkPath>& paths() const { return paths_; }
+
+ private:
+  std::vector<SkPath> paths_;
+
+  DISALLOW_COPY_AND_ASSIGN(MockCanvas);
+};
+
+// Tests that a relative move to command (R_MOVE_TO) after a close command
+// (CLOSE) uses the correct starting point. See crbug.com/697497
+TEST(VectorIconTest, RelativeMoveToAfterClose) {
+  MockCanvas mock(100, 100);
+  Canvas canvas(&mock, 1.0f);
+
+  const PathElement elements[] = {
+      MOVE_TO, 4, 5,
+      LINE_TO, 10, 11,
+      CLOSE,
+      // This move should use (4, 5) as the start point rather than (10, 11).
+      R_MOVE_TO, 20, 21,
+      R_LINE_TO, 50, 51,
+      END,
+  };
+  const VectorIcon icon = {elements, nullptr};
+
+  PaintVectorIcon(&canvas, icon, 100, SK_ColorMAGENTA);
+  ASSERT_EQ(1U, mock.paths().size());
+  SkPoint last_point;
+  EXPECT_TRUE(mock.paths()[0].getLastPt(&last_point));
+  EXPECT_EQ(SkIntToScalar(74), last_point.x());
+  EXPECT_EQ(SkIntToScalar(77), last_point.y());
+}
+
+}  // namespace
+
+}  // namespace gfx