Revert "Revert "Refcount all CFX_DIBSources (and subclasses) all the time.""

This reverts commit 31b08d4cdaa17d7a03f35e087096a77036af98ec.

Re-landing the patch after fixing skia build issue.

Change-Id: Ie7039890088b803a6ec5ce365d70f57277459b48
Reviewed-on: https://pdfium-review.googlesource.com/3245
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
diff --git a/fpdfsdk/fpdfeditimg.cpp b/fpdfsdk/fpdfeditimg.cpp
index 69151d1..ca78088 100644
--- a/fpdfsdk/fpdfeditimg.cpp
+++ b/fpdfsdk/fpdfeditimg.cpp
@@ -105,7 +105,8 @@
     if (pPage)
       pImgObj->GetImage()->ResetCache(pPage, nullptr);
   }
-  pImgObj->GetImage()->SetImage(reinterpret_cast<CFX_DIBitmap*>(bitmap));
+  CFX_RetainPtr<CFX_DIBitmap> holder(CFXBitmapFromFPDFBitmap(bitmap));
+  pImgObj->GetImage()->SetImage(holder);
   pImgObj->CalcBoundingBox();
   return true;
 }