Fix cases of variable shadowing in /samplecode/.

If we manage to fix all the existing cases of variable shadowing, we
could enable -Wshadow.

Change-Id: I4c476668a83a0054fe8624d5ffa650db202ba810
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/438376
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: Derek Sollenberger <djsollen@google.com>
Reviewed-by: Derek Sollenberger <djsollen@google.com>
diff --git a/samplecode/SamplePolyToPoly.cpp b/samplecode/SamplePolyToPoly.cpp
index 04b2b71..41af4a0 100644
--- a/samplecode/SamplePolyToPoly.cpp
+++ b/samplecode/SamplePolyToPoly.cpp
@@ -50,21 +50,19 @@
 
             (void) m2.setPolyToPoly((const SkPoint*)src1, (SkPoint*)dst1, 4);
 
-            {
-                const SkPoint src[] = {
-                    { SkIntToScalar(1), SkIntToScalar(0) },
-                    { SkIntToScalar(4), SkIntToScalar(7) },
-                    { SkIntToScalar(10), SkIntToScalar(2) }
-                };
-                const SkPoint dst[] = {
-                    { SkIntToScalar(4), SkIntToScalar(2) },
-                    { SkIntToScalar(45), SkIntToScalar(26) },
-                    { SkIntToScalar(32), SkIntToScalar(17) }
-                };
+            const SkPoint src2[] = {
+                { SkIntToScalar(1), SkIntToScalar(0) },
+                { SkIntToScalar(4), SkIntToScalar(7) },
+                { SkIntToScalar(10), SkIntToScalar(2) }
+            };
+            const SkPoint dst2[] = {
+                { SkIntToScalar(4), SkIntToScalar(2) },
+                { SkIntToScalar(45), SkIntToScalar(26) },
+                { SkIntToScalar(32), SkIntToScalar(17) }
+            };
 
-                SkMatrix m0;
-                m0.setPolyToPoly(src, dst, 3);
-            }
+            SkMatrix m0;
+            m0.setPolyToPoly(src2, dst2, 3);
         }
     }