Use macros to define pepper interfaces

ppapi/thunk/ppb_instance_api.h

Index: ppapi/thunk/ppb_instance_api.h
diff --git a/ppapi/thunk/ppb_instance_api.h b/ppapi/thunk/ppb_instance_api.h
index dcf100dc252df8f2da0cb32d5dba363343496656..e65076391393d890fa689e32a5a6926985145289 100644
--- a/ppapi/thunk/ppb_instance_api.h
+++ b/ppapi/thunk/ppb_instance_api.h
@@ -28,6 +28,15 @@ class PPB_Instance_FunctionAPI {
                                PP_Var script,
                                PP_Var* exception) = 0;
 
+  // Console.
+  virtual void Log(PP_Instance instance,
+                   int log_level,
+                   PP_Var value) = 0;
+  virtual void LogWithSource(PP_Instance instance,
+                             int log_level,
+                             PP_Var source,
+                             PP_Var value) = 0;
+
   // Fullscreen.
   virtual PP_Bool IsFullscreen(PP_Instance instance) = 0;
   virtual PP_Bool SetFullscreen(PP_Instance instance, PP_Bool fullscreen) = 0;