Check if the RenderView is alive before setting the plugin find handler

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 645 matching lines @@
 
   v8::Local<v8::Context> context =
       container_->element().document().frame()->mainWorldScriptContext();
   DCHECK(context->GetIsolate() == isolate_);
   return context;
 }
 
 void PepperPluginInstanceImpl::Delete() {
   is_deleted_ = true;
 
-  if (render_frame_ &&
+  if (render_frame_ && render_frame_->render_view() &&
       render_frame_->render_view()->plugin_find_handler() == this) {
     render_frame_->render_view()->set_plugin_find_handler(NULL);
   }
 
   // Keep a reference on the stack. See NOTE above.
   scoped_refptr<PepperPluginInstanceImpl> ref(this);
   // Force the MessageChannel to release its "passthrough object" which should
   // release our last reference to the "InstanceObject" and will probably
   // destroy it. We want to do this prior to calling DidDestroy in case the
   // destructor of the instance object tries to use the instance.
@@ skipping 2667 matching lines @@
 
 void PepperPluginInstanceImpl::RecordFlashJavaScriptUse() {
   if (initialized_ && !javascript_used_ && is_flash_plugin_) {
     javascript_used_ = true;
     RenderThread::Get()->RecordAction(
         base::UserMetricsAction("Flash.JavaScriptUsed"));
   }
 }
 
 }  // namespace content