2 files changed, 1 insertions, 5 deletions
diff --git a/core/fxcodec/gif/cfx_gifcontext.cpp b/core/fxcodec/gif/cfx_gifcontext.cpp
index fba7334c93..6159e56c13 100644
--- a/core/fxcodec/gif/cfx_gifcontext.cpp
+++ b/core/fxcodec/gif/cfx_gifcontext.cpp
@@ -348,10 +348,6 @@ uint32_t CFX_GifContext::GetAvailInput(uint8_t** avail_buf) const {
   return avail_in_;
 }
 
-int32_t CFX_GifContext::GetFrameNum() const {
-  return pdfium::CollectionSize<int32_t>(images_);
-}
-
 uint8_t* CFX_GifContext::ReadData(uint8_t** des_buf_pp, uint32_t data_size) {
   if (!next_in_)
     return nullptr;
diff --git a/core/fxcodec/gif/cfx_gifcontext.h b/core/fxcodec/gif/cfx_gifcontext.h
index e0c5900f93..3a367bd361 100644
--- a/core/fxcodec/gif/cfx_gifcontext.h
+++ b/core/fxcodec/gif/cfx_gifcontext.h
@@ -41,7 +41,7 @@ class CFX_GifContext : public CCodec_GifModule::Context {
   CFX_GifDecodeStatus LoadFrame(int32_t frame_num);
   void SetInputBuffer(uint8_t* src_buf, uint32_t src_size);
   uint32_t GetAvailInput(uint8_t** avail_buf) const;
-  int32_t GetFrameNum() const;
+  size_t GetFrameNum() const { return images_.size(); }
 
   UnownedPtr<CCodec_GifModule> gif_module_;
   UnownedPtr<CCodec_GifModule::Delegate> delegate_;