Compare drawBounds with MakeLargest instead of isFinite

In some cases, transformedBounds is finite but its rounded out
IRect is empty so we can't do that.

TBR: reed@google.com
Bug: skia:
Change-Id: Ife78e91a494964042fa09b8cbe86cabbd2572fb9
Reviewed-on: https://skia-review.googlesource.com/92625
Reviewed-by: Yuqian Li <liyuqian@google.com>
Commit-Queue: Yuqian Li <liyuqian@google.com>
diff --git a/src/core/SkThreadedBMPDevice.cpp b/src/core/SkThreadedBMPDevice.cpp
index 8c201f3..bdb5f95 100644
--- a/src/core/SkThreadedBMPDevice.cpp
+++ b/src/core/SkThreadedBMPDevice.cpp
@@ -73,11 +73,11 @@
 }
 
 SkIRect SkThreadedBMPDevice::transformDrawBounds(const SkRect& drawBounds) const {
+    if (drawBounds == SkRectPriv::MakeLargest()) {
+        return SkRectPriv::MakeILargest();
+    }
     SkRect transformedBounds;
     this->ctm().mapRect(&transformedBounds, drawBounds);
-    if (!transformedBounds.isFinite()) {
-        transformedBounds = SkRectPriv::MakeLargestS32();
-    }
     return transformedBounds.roundOut();
 }