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

chrome/common/pepper_plugin_registry.h

Index: chrome/common/pepper_plugin_registry.h
===================================================================
--- chrome/common/pepper_plugin_registry.h	(revision 77663)
+++ chrome/common/pepper_plugin_registry.h	(working copy)
@@ -11,6 +11,7 @@
 #include <vector>
 
 #include "base/file_path.h"
+#include "ppapi/proxy/dispatcher.h"
 #include "webkit/plugins/npapi/webplugininfo.h"
 #include "webkit/plugins/ppapi/plugin_delegate.h"
 #include "webkit/plugins/ppapi/plugin_module.h"
@@ -45,7 +46,8 @@
 // is a list of all live modules (some of which may be out-of-process and hence
 // not preloaded).
 class PepperPluginRegistry
-    : public webkit::ppapi::PluginDelegate::ModuleLifetime {
+    : public webkit::ppapi::PluginDelegate::ModuleLifetime,
+      public pp::proxy::Dispatcher::Delegate {
  public:
   ~PepperPluginRegistry();
 
@@ -90,6 +92,11 @@
  private:
   PepperPluginRegistry();
 
+  // Dispatcher::Delegate implementation.
+  virtual MessageLoop* GetIPCMessageLoop();
+  virtual base::WaitableEvent* GetShutdownEvent();
+  virtual std::set<PP_Instance>* GetGloballySeenInstanceIDSet();
+
   // All known pepper plugins.
   std::vector<PepperPluginInfo> plugin_list_;