Pepper: Fix reentrancy problem in PepperPluginInstanceImpl.

content/renderer/pepper/pepper_plugin_instance_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/renderer/pepper/pepper_plugin_instance_impl.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/logging.h"
 #include "base/memory/linked_ptr.h"
@@ skipping 3117 matching lines @@
       base::MessageLoop::current()->PostTask(
           FROM_HERE,
           base::Bind(&PepperPluginInstanceImpl::ReportGeometry, this));
     }
   }
 
   return true;
 }
 
 bool PepperPluginInstanceImpl::IsRectTopmost(const gfx::Rect& rect) {
+  if (is_deleted_)
+    return false;
+
   if (flash_fullscreen_)
     return true;
 
   return container_->isRectTopmost(rect);
 }
 
 int32_t PepperPluginInstanceImpl::Navigate(
     const ppapi::URLRequestInfoData& request,
     const char* target,
     bool from_user_action) {
@@ skipping 191 matching lines @@
 
 void PepperPluginInstanceImpl::RecordFlashJavaScriptUse() {
   if (initialized_ && !javascript_used_ && is_flash_plugin_) {
     javascript_used_ = true;
     RenderThread::Get()->RecordAction(
         base::UserMetricsAction("Flash.JavaScriptUsed"));
   }
 }
 
 }  // namespace content