Add C++ Trace Event support to PPAPI/NaCl SDK

ppapi/cpp/dev/trace_event_dev.cc

+// Copyright (c) 2013 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.
+
+#include "ppapi/cpp/dev/trace_event_dev.h"
+
+#include "ppapi/c/dev/ppb_trace_event_dev.h"
+#include "ppapi/cpp/module.h"
+#include "ppapi/cpp/module_impl.h"
+
+namespace pp {
+
+namespace {
+
+template <> const char* interface_name<PPB_Trace_Event_Dev>() {
+  return PPB_TRACE_EVENT_DEV_INTERFACE_0_1;
+}
+
+}  // namespace
+
+const unsigned char* Trace_Events::GetCategoryEnabled(
+    const char* category_name) {
+  // This casting is due to limitations in PPAPI. It is unable to return
+  // a const pointer, and all pointer return types are necessarily void*.
+  return reinterpret_cast<const unsigned char*>(
+      get_interface<PPB_Trace_Event_Dev>()->GetCategoryEnabled(category_name));
+}
+
+void Trace_Events::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) {
+  get_interface<PPB_Trace_Event_Dev>()->AddTraceEvent(phase, category_enabled,
+      name, id, num_args, arg_names, arg_types, arg_values, flags);
+}
+
+void Trace_Events::SetThreadName(const char* thread_name) {
+  get_interface<PPB_Trace_Event_Dev>()->SetThreadName(thread_name);
+}
+
+}  // namespace pp