Use macros to define pepper interfaces

ppapi/proxy/plugin_dispatcher.h

Index: ppapi/proxy/plugin_dispatcher.h
diff --git a/ppapi/proxy/plugin_dispatcher.h b/ppapi/proxy/plugin_dispatcher.h
index 896689e6a9d88d0bc04313cf003a52c60b6c2de6..39ae340df410666ccdbf7adefbe2592eb5a8e407 100644
--- a/ppapi/proxy/plugin_dispatcher.h
+++ b/ppapi/proxy/plugin_dispatcher.h
@@ -88,7 +88,11 @@ class PPAPI_PROXY_EXPORT PluginDispatcher : public Dispatcher {
   // object as a convenience. Returns NULL on failure.
   static PluginDispatcher* GetForResource(const Resource* resource);
 
-  static const void* GetInterfaceFromDispatcher(const char* interface);
+  // Implements the GetInterface function for the plugin to call to retrieve
+  // a browser interface.
+  static const void* GetBrowserInterface(const char* interface);
+
+  const void* GetPluginInterface(const std::string& interface_name);
 
   // You must call this function before anything else. Returns true on success.
   // The delegate pointer must outlive this class, ownership is not
@@ -148,14 +152,12 @@ class PPAPI_PROXY_EXPORT PluginDispatcher : public Dispatcher {
 
   PluginDelegate* plugin_delegate_;
 
-  // All target proxies currently created. These are ones that receive
-  // messages.
-  scoped_ptr<InterfaceProxy> target_proxies_[INTERFACE_ID_COUNT];
-
-  // Function proxies created for "new-style" FunctionGroups.
-  // TODO(brettw) this is in progress. It should be merged with the target
-  // proxies so there is one list to consult.
-  scoped_ptr<FunctionGroupBase> function_proxies_[INTERFACE_ID_COUNT];
+  // Contains all the plugin interfaces we've queried. The mapped value will
+  // be the pointer to the interface pointer supplied by the plugin if it's
+  // supported, or NULL if it's not supported. This allows us to cache failures
+  // and not req-query if a plugin doesn't support the interface.
+  typedef base::hash_map<std::string, const void*> InterfaceMap;
+  InterfaceMap plugin_interfaces_;
 
   typedef base::hash_map<PP_Instance, InstanceData> InstanceDataMap;
   InstanceDataMap instance_map_;