Pass the selected non-native file information from the browser to FileInputType.

Source/core/fileapi/File.cpp

Index: Source/core/fileapi/File.cpp
diff --git a/Source/core/fileapi/File.cpp b/Source/core/fileapi/File.cpp
index 120954f463f504ab2e88b270d636368b22c9a0c4..795aa491a9a7f618723e33caa6c0f64c9c3b8c9e 100644
--- a/Source/core/fileapi/File.cpp
+++ b/Source/core/fileapi/File.cpp
@@ -296,4 +296,21 @@ void File::appendTo(BlobData& blobData) const
     blobData.appendFile(m_path, 0, size, modificationTime);
 }
 
+bool File::hasSameSource(const File& other) const
+{
+    if (m_hasBackingFile != other.m_hasBackingFile)
+        return false;
+
+    if (m_hasBackingFile)
+        return m_path == other.m_path;
+
+    if (m_fileSystemURL.isEmpty() != other.m_fileSystemURL.isEmpty())
+        return false;
+
+    if (!m_fileSystemURL.isEmpty())
+        return m_fileSystemURL == other.m_fileSystemURL;
+
+    return uuid() == other.uuid();
+}
+
 } // namespace blink