Terminate plugins as well as runing onunload handlers during slow shutdown.

content/renderer/pepper/pepper_plugin_delegate_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_delegate_impl.h"
 
 #include <cmath>
 #include <cstddef>
 #include <map>
 #include <queue>
@@ skipping 1390 matching lines @@
     IPC_MESSAGE_HANDLER(PpapiMsg_PPBTCPServerSocket_AcceptACK,
                         OnTCPServerSocketAcceptACK)
     IPC_MESSAGE_HANDLER(PpapiMsg_PPBHostResolver_ResolveACK,
                         OnHostResolverResolveACK)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 void PepperPluginDelegateImpl::OnDestruct() {
-  // Nothing to do here. Default implementation in RenderViewObserver does
-  // 'delete this' but it's not suitable for PepperPluginDelegateImpl because
-  // it's non-pointer member in RenderViewImpl.
+  // This method may be called as part of an abbreviated shutdown by
+  // RenderViewImpl::OnShouldClose() as well as part of a full cleanup.
+  // Default implementation in RenderViewObserver does 'delete this' but it's
+  // not suitable for PepperPluginDelegateImpl because it's non-pointer member
+  // in RenderViewImpl.
+  while (active_instances_.begin() != active_instances_.end()) {
+    webkit::ppapi::PluginInstance* instance = *active_instances_.begin();
+    instance->Delete();
+    active_instances_.erase(instance);
+  }
 }
 
 void PepperPluginDelegateImpl::OnTCPSocketConnectACK(
     uint32 plugin_dispatcher_id,
     uint32 socket_id,
     bool succeeded,
     const PP_NetAddress_Private& local_addr,
     const PP_NetAddress_Private& remote_addr) {
   webkit::ppapi::PPB_TCPSocket_Private_Impl* socket =
       tcp_sockets_.Lookup(socket_id);
@@ skipping 208 matching lines @@
     mouse_lock_instances_.erase(it);
   }
 }
 
 webkit_glue::ClipboardClient*
     PepperPluginDelegateImpl::CreateClipboardClient() const {
   return new RendererClipboardClient;
 }
 
 }  // namespace content