Ensure that PP_Instance values are unique within a plugin process in addition...

ppapi/proxy/plugin_dispatcher.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 "ppapi/proxy/plugin_dispatcher.h"
 
 #include <map>
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "ipc/ipc_message.h"
 #include "ipc/ipc_sync_channel.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/proxy/interface_proxy.h"
+#include "ppapi/proxy/plugin_message_filter.h"
 #include "ppapi/proxy/plugin_var_serialization_rules.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/proxy/ppp_class_proxy.h"
 
 #if defined(OS_POSIX)
 #include "base/eintr_wrapper.h"
 #include "ipc/ipc_channel_posix.h"
 #endif
 
 namespace pp {
@@ skipping 40 matching lines @@
 // static
 const void* PluginDispatcher::GetInterfaceFromDispatcher(
     const char* interface) {
   // All interfaces the plugin requests of the browser are "PPB".
   const InterfaceProxy::Info* info = GetPPBInterfaceInfo(interface);
   if (!info)
     return NULL;
   return info->interface;
 }
 
+bool PluginDispatcher::InitWithChannel(
+    Delegate* delegate,
+    const IPC::ChannelHandle& channel_handle,
+    bool is_client) {
+  if (!Dispatcher::InitWithChannel(delegate, channel_handle, is_client))
+    return false;
+
+  // The message filter will intercept and process certain messages directly
+  // on the I/O thread.
+  channel()->AddFilter(
+      new PluginMessageFilter(delegate->GetGloballySeenInstanceIDSet()));
+  return true;
+}
+
 bool PluginDispatcher::IsPlugin() const {
   return true;
 }
 
 bool PluginDispatcher::OnMessageReceived(const IPC::Message& msg) {
   // Handle common control messages.
   if (Dispatcher::OnMessageReceived(msg))
     return true;
 
   if (msg.routing_id() == MSG_ROUTING_CONTROL) {
@@ skipping 138 matching lines @@
   if (!interface_functions)
     return;
   target_proxies_[info->id].reset(
       info->create_proxy(this, interface_functions));
   *result = true;
 }
 
 }  // namespace proxy
 }  // namespace pp