backout a268f8037bb0

content/html/content/src/HTMLInputElement.cpp

@@ -618,10 +618,6 @@ HTMLInputElement::nsFilePickerShownCallback::Done(int16_t aResult)
 
   mInput->CancelDirectoryPickerScanIfRunning();
 
-  // Clear HTMLInputElement.files early to avoid authors thinking the old list
-  // is the result of the directory picker operation before its completed.
-  mInput->ClearFiles();
-
   int16_t mode;
   mFilePicker->GetMode(&mode);
 
@@ -2458,12 +2454,6 @@ HTMLInputElement::SetFiles(nsIDOMFileList* aFiles,
   AfterSetFiles(aSetValueChanged);
 }
 
-void
-HTMLInputElement::ClearFiles()
-{
-  mFiles.Clear();
-}
-
 void
 HTMLInputElement::AfterSetFiles(bool aSetValueChanged)
 {

content/html/content/src/HTMLInputElement.h

@@ -201,7 +201,6 @@ public:
 
   void SetFiles(const nsTArray<nsCOMPtr<nsIDOMFile> >& aFiles, bool aSetValueChanged);
   void SetFiles(nsIDOMFileList* aFiles, bool aSetValueChanged);
-  void ClearFiles();
 
   void SetCheckedChangedInternal(bool aCheckedChanged);
   bool GetCheckedChanged() const {