Use CheckedNumeric when converting SkIRect to gfx::Rect.

cc/output/filter_operation.cc

Index: cc/output/filter_operation.cc
diff --git a/cc/output/filter_operation.cc b/cc/output/filter_operation.cc
index 198057a265d9643d150ed8d66123192452813e59..257beda888d610f2bfcc194d564db71c2b526a4c 100644
--- a/cc/output/filter_operation.cc
+++ b/cc/output/filter_operation.cc
@@ -361,8 +361,8 @@ gfx::Rect MapRectInternal(const FilterOperation& op,
     case FilterOperation::REFERENCE: {
       if (!op.image_filter())
         return rect;
-      return gfx::SkIRectToRect(op.image_filter()->filterBounds(
-          gfx::RectToSkIRect(rect), matrix, direction));
+      return gfx::SkIRectToRectChecked(op.image_filter()->filterBounds(
+          gfx::RectToSkIRectChecked(rect), matrix, direction));
     }
     default:
       return rect;