Don't populate URL data in WebDropData when dragging files.

ui/base/dragdrop/os_exchange_data_provider_win.cc

Index: ui/base/dragdrop/os_exchange_data_provider_win.cc
diff --git a/ui/base/dragdrop/os_exchange_data_provider_win.cc b/ui/base/dragdrop/os_exchange_data_provider_win.cc
index 9b16b0244cbdb8b0463ba2f520b9c31872142356..ac0776e4b7b8f7ead6ca0795e2c258c4b20a5cd1 100644
--- a/ui/base/dragdrop/os_exchange_data_provider_win.cc
+++ b/ui/base/dragdrop/os_exchange_data_provider_win.cc
@@ -386,10 +386,16 @@ bool OSExchangeDataProviderWin::GetString(base::string16* data) const {
   return ClipboardUtil::GetPlainText(source_object_, data);
 }
 
-bool OSExchangeDataProviderWin::GetURLAndTitle(GURL* url,
-                                               base::string16* title) const {
+bool OSExchangeDataProviderWin::GetURLAndTitle(
+    OSExchangeData::FilenameToURLPolicy policy,
+    GURL* url,
+    base::string16* title) const {
   base::string16 url_str;
-  bool success = ClipboardUtil::GetUrl(source_object_, &url_str, title, true);
+  bool success = ClipboardUtil::GetUrl(
+      source_object_,
+      &url_str,
+      title,
+      policy == OSExchangeData::CONVERT_FILENAMES ? true : false);
   if (success) {
     GURL test_url(url_str);
     if (test_url.is_valid()) {