Reland: Add trace event Pepper API

ppapi/shared_impl/ppb_trace_event_impl.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.
+
+#ifndef PPAPI_SHARED_IMPL_PPB_TRACE_EVENT_IMPL_H_
+#define PPAPI_SHARED_IMPL_PPB_TRACE_EVENT_IMPL_H_
+
+#include "ppapi/c/dev/ppb_trace_event_dev.h"
+#include "ppapi/c/pp_bool.h"
+#include "ppapi/shared_impl/ppapi_shared_export.h"
+
+namespace ppapi {
+
+// Contains the implementation of the PPB_Trace_Event_Dev functions. Since these
+// functions are to be run from whatever plugin process/thread in which they
+// originated, the implementation lives in shared_impl.
+//
+class PPAPI_SHARED_EXPORT TraceEventImpl {
+ public:
+  static void* GetCategoryEnabled(const char* category_name);
+  static void AddTraceEvent(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[],
+                               uint8_t flags);
+  static void SetThreadName(const char* thread_name);
+};
+
+}  // namespace ppapi
+
+#endif  // PPAPI_SHARED_IMPL_PPB_TRACE_EVENT_IMPL_H_