Add trace event Pepper API

ppapi/c/dev/ppb_trace_event_dev.h

+/* Copyright (c) 2012 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.
+ */
+
+/* From dev/ppb_trace_event_dev.idl modified Wed Dec  5 16:55:45 2012. */
+
+#ifndef PPAPI_C_DEV_PPB_TRACE_EVENT_DEV_H_
+#define PPAPI_C_DEV_PPB_TRACE_EVENT_DEV_H_
+
+#include "ppapi/c/pp_instance.h"
+#include "ppapi/c/pp_macros.h"
+#include "ppapi/c/pp_stdint.h"
+
+#define PPB_TRACE_EVENT_DEV_INTERFACE_0_1 "PPB_Trace_Event(Dev);0.1"
+#define PPB_TRACE_EVENT_DEV_INTERFACE PPB_TRACE_EVENT_DEV_INTERFACE_0_1
+
+/**
+ * @file
+ * This file defines the <code>PPB_Trace_Event</code> interface. It is meant
+ * to be used in plugins as the API that trace macros from trace_event.h use.
+ * It is not supported in Native Client currently.
+ */
+
+
+/**
+ * @addtogroup Interfaces
+ * @{
+ */
+struct PPB_Trace_Event_Dev_0_1 {
+  /**
+   * Gets a pointer to a character for identifying a category name in the
+   * tracing system as well as for being able to early exit in client-side
+   * tracing code.
+   *
+   * NB: This mem_t return value should technically be const, but return values
+   * for Pepper IDL of mem_t type are not const.  The same is true for the arg
+   * |category_enabled| for AddTraceEvent.
+   */
+  void* (*GetCategoryEnabled)(PP_Instance instance, const char* category_name);
+  /**
+   * Adds a trace event to the platform tracing system.
+   */
+  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);
+  /**
+   * Sets the thread name so it will show up properly in chrome://tracing.
+   */
+  void (*SetThreadName)(PP_Instance instance, const char* thread_name);
+};
+
+typedef struct PPB_Trace_Event_Dev_0_1 PPB_Trace_Event_Dev;
+/**
+ * @}
+ */
+
+#endif  /* PPAPI_C_DEV_PPB_TRACE_EVENT_DEV_H_ */
+