Add support for repeating-conic-gradient()

third_party/WebKit/LayoutTests/fast/gradients/conic-gradient-out-of-range.html

+<style>
+div {
+  width: 80px;
+  height: 80px;
+  border: 1px solid grey;
+  display: inline-block;
+  margin: 5px;
+}
+
+.reference1 {
+  background: conic-gradient(rgb(0%, 75%, 25%), rgb(0%, 25%, 75%));
+}
+
+.c1 {
+  background: conic-gradient(rgb(0%, 75%, 25%), rgb(0%, 0%, 100%) 150%);
+}
+
+.c2 {
+  background: conic-gradient(rgb(0%, 100%, 0%) -50%, rgb(0%, 25%, 75%));
+}
+
+.c3 {
+  background: conic-gradient(rgb(0%, 100%, 0%) -50%, rgb(0%, 0%, 100%) 150%);
+}
+
+.c4 {
+  background: repeating-conic-gradient(rgb(0%, 75%, 25%), rgb(0%, 25%, 75%));
+}
+
+.c5 {
+  background: repeating-conic-gradient(rgb(0%, 100%, 0%) -50%, rgb(0%, 25%, 75%));
+}
+
+.c6 {
+  background: repeating-conic-gradient(rgb(0%, 75%, 25%), rgb(0%, 0%, 100%) 150%);
+}
+
+.c7 {
+  background: repeating-conic-gradient(rgb(0%, 100%, 0%) -50%, rgb(0%, 0%, 100%) 150%);
+}
+
+.reference2 {
+  background: repeating-conic-gradient(#0f0 20deg, yellow 50deg, blue 70deg, #0f0 140deg);
+}
+
+.c8 {
+  background: repeating-conic-gradient(blue -50deg, #0f0 20deg, yellow 50deg, blue 70deg);
+}
+
+.c9 {
+  background: repeating-conic-gradient(yellow -70deg, blue -50deg, #0f0 20deg, yellow 50deg);
+}
+
+.c10 {
+  background: repeating-conic-gradient(#0f0 -100deg, yellow -70deg, blue -50deg, #0f0 20deg);
+}
+
+.c11 {
+  background: repeating-conic-gradient(blue -170deg, #0f0 -100deg, yellow -70deg, blue -50deg);
+}
+
+.c12 {
+  background: repeating-conic-gradient(#0f0 260deg, yellow 290deg, blue 310deg, #0f0 380deg);
+}
+
+.c13 {
+  background: repeating-conic-gradient(yellow 290deg, blue 310deg, #0f0 380deg, yellow 410deg);
+}
+
+.c14 {
+  background: repeating-conic-gradient(blue 310deg, #0f0 380deg, yellow 410deg, blue 430deg);
+}
+
+</style>
+
+<p>All gradients in a row should render the same.</p>
+
+<div class="reference1"></div>
+<div class="c1"></div>
+<div class="c2"></div>
+<div class="c3"></div>
+<div class="c4"></div>
+<div class="c5"></div>
+<div class="c6"></div>
+<div class="c7"></div>
+<br>
+
+<div class="reference2"></div>
+<div class="c8"></div>
+<div class="c9"></div>
+<div class="c10"></div>
+<div class="c11"></div>
+<div class="c12"></div>
+<div class="c13"></div>
+<div class="c14"></div>
+