End the drag and drop operation properly.

content/browser/renderer_host/render_view_host_impl.cc

 // Copyright (c) 2012 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 "content/browser/renderer_host/render_view_host_impl.h"
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 992 matching lines @@
   delegate_->RouteCloseEvent(this);
 }
 
 void RenderViewHostImpl::OnStartDragging(
     const DropData& drop_data,
     WebDragOperationsMask drag_operations_mask,
     const SkBitmap& bitmap,
     const gfx::Vector2d& bitmap_offset_in_dip,
     const DragEventSourceInfo& event_info) {
   RenderViewHostDelegateView* view = delegate_->GetDelegateView();
-  if (!view)
+  if (!view) {
+    // Need to clear drag and drop state in blink.
+    DragSourceSystemDragEnded();
     return;
+  }
 
   DropData filtered_data(drop_data);
   RenderProcessHost* process = GetProcess();
   ChildProcessSecurityPolicyImpl* policy =
       ChildProcessSecurityPolicyImpl::GetInstance();
 
   // Allow drag of Javascript URLs to enable bookmarklet drag to bookmark bar.
   if (!filtered_data.url.SchemeIs(url::kJavaScriptScheme))
     process->FilterURL(true, &filtered_data.url);
   process->FilterURL(false, &filtered_data.html_base_url);
@@ skipping 296 matching lines @@
     // Note: We are using the origin URL provided by the sender here. It may be
     // different from the receiver's.
     file_system_file.url =
         GURL(storage::GetIsolatedFileSystemRootURIString(
                  file_system_url.origin(), filesystem_id, std::string())
                  .append(register_name));
   }
 }
 
 }  // namespace content