SkTDynamicHash: support remove() without needing Deleted().

tests/ImageCacheTest.cpp

Index: tests/ImageCacheTest.cpp
diff --git a/tests/ImageCacheTest.cpp b/tests/ImageCacheTest.cpp
index 947ece1e2137e3467cf40f11c07ff03ac8f3a337..877591acc777bc44177fddcb28b496e18463d9b8 100644
--- a/tests/ImageCacheTest.cpp
+++ b/tests/ImageCacheTest.cpp
@@ -48,14 +48,14 @@ static void TestImageCache(skiatest::Reporter* reporter) {
 
     // stress test, should trigger purges
     for (size_t i = 0; i < COUNT * 100; ++i) {
+        scale += 1;
+
         SkBitmap tmp;
 
         make_bm(&tmp, DIM, DIM);
         id = cache.addAndLock(bm[0], scale, scale, tmp);
         REPORTER_ASSERT(reporter, NULL != id);
         cache.unlock(id);
-
-        scale += 1;
     }
 
     cache.setByteLimit(0);