Compute ResourceResponse::suggestedFileName on the fly.

third_party/WebKit/Source/core/clipboard/DataTransfer.cpp

Index: third_party/WebKit/Source/core/clipboard/DataTransfer.cpp
diff --git a/third_party/WebKit/Source/core/clipboard/DataTransfer.cpp b/third_party/WebKit/Source/core/clipboard/DataTransfer.cpp
index 66b9457b48a42b0fc524b5e73851c94df520491c..cc579d1d50a5558b64b4293f66ef4a56a77c1cb0 100644
--- a/third_party/WebKit/Source/core/clipboard/DataTransfer.cpp
+++ b/third_party/WebKit/Source/core/clipboard/DataTransfer.cpp
@@ -43,6 +43,7 @@
 #include "platform/MIMETypeRegistry.h"
 #include "platform/clipboard/ClipboardMimeTypes.h"
 #include "platform/clipboard/ClipboardUtilities.h"
+#include "platform/network/NetworkUtils.h"
 #include <memory>
 
 namespace blink {
@@ -276,8 +277,8 @@ static void writeImageToDataObject(DataObject* dataObject,
   String imageExtension = cachedImage->getImage()->filenameExtension();
   ASSERT(!imageExtension.isEmpty());
 
-  // Determine the filename for the file contents of the image.
-  String filename = cachedImage->response().suggestedFilename();
+  String filename = NetworkUtils::getSuggestedFilename(
+      url, cachedImage->response().httpHeaderField("content-disposition"));
   if (filename.isEmpty())
     filename = url.lastPathComponent();