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

chrome/browser/ui/views/toolbar/home_button.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/views/toolbar/home_button.h"
 
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/common/pref_names.h"
@@ skipping 147 matching lines @@
 }
 
 int HomeButton::OnDragUpdated(const ui::DropTargetEvent& event) {
   return (event.source_operations() & ui::DragDropTypes::DRAG_LINK) ?
       ui::DragDropTypes::DRAG_LINK : ui::DragDropTypes::DRAG_NONE;
 }
 
 int HomeButton::OnPerformDrop(const ui::DropTargetEvent& event) {
   GURL new_homepage_url;
   base::string16 title;
-  if (event.data().GetURLAndTitle(&new_homepage_url, &title) &&
+  if (event.data().GetURLAndTitle(
+          ui::OSExchangeData::CONVERT_FILENAMES, &new_homepage_url, &title) &&
       new_homepage_url.is_valid()) {
     PrefService* prefs = browser_->profile()->GetPrefs();
     bool old_is_ntp = prefs->GetBoolean(prefs::kHomePageIsNewTabPage);
     GURL old_homepage(prefs->GetString(prefs::kHomePage));
 
     prefs->SetBoolean(prefs::kHomePageIsNewTabPage, false);
     prefs->SetString(prefs::kHomePage, new_homepage_url.spec());
 
     HomePageUndoBubble::ShowBubble(browser_, old_is_ntp, old_homepage, this);
   }
   return ui::DragDropTypes::DRAG_NONE;
 }