When "Clear site data on exit" is checked, only pass the private mode flag to Flash.

content/browser/renderer_host/render_message_filter.cc

 // Copyright (c) 2011 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_message_filter.h"
 
 #include <map>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 173 matching lines @@
 
   virtual int ID() OVERRIDE {
     return filter()->render_process_id();
   }
 
   virtual const content::ResourceContext& GetResourceContext() OVERRIDE {
     return context_;
   }
 
   virtual bool OffTheRecord() OVERRIDE {
-    return filter()->OffTheRecord();
+    if (filter()->OffTheRecord())
+      return true;
+    if (content::GetContentClient()->browser()->AllowSaveLocalState(context_))
+      return false;
+
+    // For now, only disallow storing data for Flash <http://crbug.com/97319>.
+    for (size_t i = 0; i < info_.mime_types.size(); ++i) {
+      if (info_.mime_types[i].mime_type == "application/x-shockwave-flash")

[jam, 2011/10/07 16:08:02]

nit: please use kFlashPluginSwfMimeType from plugin_constants.h

[Bernhard Bauer, 2011/10/07 16:26:19]

Done. Thanks for the tip!

+        return true;
+    }
+    return false;
   }
 
   virtual void SetPluginInfo(const webkit::WebPluginInfo& info) OVERRIDE {
     info_ = info;
   }
 
   virtual void OnFoundPluginProcessHost(PluginProcessHost* host) OVERRIDE {
     DCHECK(host);
     host_ = host;
   }
@@ skipping 162 matching lines @@
   IPC_END_MESSAGE_MAP_EX()
 
   return handled;
 }
 
 void RenderMessageFilter::OnDestruct() const {
   BrowserThread::DeleteOnIOThread::Destruct(this);
 }
 
 bool RenderMessageFilter::OffTheRecord() const {
-  return incognito_ ||
-         !content::GetContentClient()->browser()->AllowSaveLocalState(
-             resource_context_);
+  return incognito_;
 }
 
 void RenderMessageFilter::OnMsgCreateWindow(
     const ViewHostMsg_CreateWindow_Params& params,
     int* route_id, int64* cloned_session_storage_namespace_id) {
   if (!content::GetContentClient()->browser()->CanCreateWindow(
           params.opener_url, params.window_container_type, resource_context_)) {
     *route_id = MSG_ROUTING_NONE;
     return;
   }
@@ skipping 455 matching lines @@
   ViewHostMsg_GetRawCookies::WriteReplyParams(reply_msg, cookies);
   Send(reply_msg);
 }
 
 void RenderMessageFilter::OnCompletedOpenChannelToNpapiPlugin(
     OpenChannelToNpapiPluginCallback* client) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   DCHECK(ContainsKey(plugin_host_clients_, client));
   plugin_host_clients_.erase(client);
 }