Add trace event Pepper API

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 cb524184eca320bd84810a97aad8076b54890fb0..4b40313781a11e847ba94026bccdfb6ec52fc288 100644
--- a/ppapi/thunk/ppb_instance_api.h
+++ b/ppapi/thunk/ppb_instance_api.h
@@ -9,6 +9,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "ppapi/c/dev/ppb_console_dev.h"
 #include "ppapi/c/dev/ppb_text_input_dev.h"
+#include "ppapi/c/dev/ppb_trace_event_dev.h"
 #include "ppapi/c/dev/ppb_url_util_dev.h"
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_completion_callback.h"
@@ -148,6 +149,24 @@ class PPB_Instance_API {
   // Testing and URLUtil.
   virtual PP_Var GetDocumentURL(PP_Instance instance,
                                 PP_URLComponents_Dev* components) = 0;
+
+  // Trace event.
+  virtual void* GetCategoryEnabled(PP_Instance instance,
+                                   const char* category_name) = 0;
+  virtual int32_t AddTraceEvent(PP_Instance instance,
+                                int8_t phase,
+                                const void* category_enabled,
+                                const char* name,
+                                uint64_t id,
+                                uint32_t num_args,
+                                const char* arg_names[],
+                                const uint8_t arg_types[],
+                                const uint64_t arg_values[],
+                                int32_t threshold_begin_id,
+                                int64_t threshold,
+                                uint8_t flags) = 0;
+  virtual void SetThreadName(PP_Instance instance, const char* thread_name) = 0;
+
 #if !defined(OS_NACL)
   // Content Decryptor.
   virtual void NeedKey(PP_Instance instance,