[tracing] Avoid Gcc compilation fail by declaring AddTraceEvent function in Class derived from Plat…

test/cctest/test-trace-event.cc

 // Copyright 2015 the V8 project 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 <stdlib.h>
 #include <string.h>
 
 #include "src/v8.h"
 
 #include "src/list.h"
 #include "src/list-inl.h"
@@ skipping 53 matching lines @@
   bool IdleTasksEnabled(Isolate* isolate) override { return false; }
 
   bool PendingIdleTask() { return false; }
 
   void PerformIdleTask(double idle_time_in_seconds) {}
 
   bool PendingDelayedTask() { return false; }
 
   void PerformDelayedTask() {}
 
+  using Platform::AddTraceEvent;
   uint64_t AddTraceEvent(
       char phase, const uint8_t* category_enabled_flag, const char* name,
       const char* scope, uint64_t id, uint64_t bind_id, int num_args,
       const char** arg_names, const uint8_t* arg_types,
       const uint64_t* arg_values,
       std::unique_ptr<v8::ConvertableToTraceFormat>* arg_convertables,
       unsigned int flags) override {
     MockTraceObject* to = new MockTraceObject(phase, std::string(name), id,
                                               bind_id, num_args, flags);
     trace_object_list_.Add(to);
@@ skipping 191 matching lines @@
   CHECK_EQ("Isolate", GET_TRACE_OBJECT(0)->name);
   CHECK_EQ(isolate_id, GET_TRACE_OBJECT(0)->id);
   CHECK_EQ(TRACE_EVENT_PHASE_COMPLETE, GET_TRACE_OBJECT(1)->phase);
   CHECK_EQ("e", GET_TRACE_OBJECT(1)->name);
   CHECK_EQ(TRACE_EVENT_PHASE_LEAVE_CONTEXT, GET_TRACE_OBJECT(2)->phase);
   CHECK_EQ("Isolate", GET_TRACE_OBJECT(2)->name);
   CHECK_EQ(isolate_id, GET_TRACE_OBJECT(2)->id);
 
   i::V8::SetPlatformForTesting(old_platform);
 }