try to speed-up maprect + round2i + contains

tests/RectTest.cpp

Index: tests/RectTest.cpp
diff --git a/tests/RectTest.cpp b/tests/RectTest.cpp
index 820586c3c67755f7402cf59079911ec6543feacf..719b5b9ae70888d03040e2a4f57203914d193e30 100644
--- a/tests/RectTest.cpp
+++ b/tests/RectTest.cpp
@@ -88,3 +88,35 @@ DEF_TEST(Rect, reporter) {
     test_stroke_width_clipping(reporter);
     test_skbug4406(reporter);
 }
+
+DEF_TEST(Rect_round, reporter) {
+    SkRandom rand;
+
+    for (int i = 0; i < 100000; ++i) {
+        SkRect src = SkRect::MakeXYWH(rand.nextSScalar1() * 1000,
+                                      rand.nextSScalar1() * 1000,
+                                      rand.nextUScalar1() * 1000,
+                                      rand.nextUScalar1() * 1000);
+        SkRect rd0 = {
+            SkScalarRoundToScalar(src.fLeft),
+            SkScalarRoundToScalar(src.fTop),
+            SkScalarRoundToScalar(src.fRight),
+            SkScalarRoundToScalar(src.fBottom)
+        };
+        SkRect rd1 = src.round2s();
+
+        REPORTER_ASSERT(reporter, rd0 == rd1);
+
+        SkIRect ir0 = {
+            SkScalarRoundToInt(src.fLeft),
+            SkScalarRoundToInt(src.fTop),
+            SkScalarRoundToInt(src.fRight),
+            SkScalarRoundToInt(src.fBottom)
+        };
+        SkIRect ir1 = src.round();
+        SkIRect ir2 = src.round2i();
+
+        REPORTER_ASSERT(reporter, ir0 == ir1);
+        REPORTER_ASSERT(reporter, ir0 == ir2);
+    }
+}