Revert of [Tracing] V8 Tracing Controller

src/libplatform/default-platform.cc

 // Copyright 2013 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 "src/libplatform/default-platform.h"
 
 #include <algorithm>
 #include <queue>
 
 #include "src/base/logging.h"
@@ skipping 11 matching lines @@
   platform->SetThreadPoolSize(thread_pool_size);
   platform->EnsureInitialized();
   return platform;
 }
 
 
 bool PumpMessageLoop(v8::Platform* platform, v8::Isolate* isolate) {
   return reinterpret_cast<DefaultPlatform*>(platform)->PumpMessageLoop(isolate);
 }
 
-void SetTracingController(
-    v8::Platform* platform,
-    v8::platform::tracing::TracingController* tracing_controller) {
-  return reinterpret_cast<DefaultPlatform*>(platform)->SetTracingController(
-      tracing_controller);
-}
-
 const int DefaultPlatform::kMaxThreadPoolSize = 8;
 
 DefaultPlatform::DefaultPlatform()
-    : initialized_(false), thread_pool_size_(0), tracing_controller_(NULL) {}
+    : initialized_(false), thread_pool_size_(0) {}
+
 
 DefaultPlatform::~DefaultPlatform() {
   base::LockGuard<base::Mutex> guard(&lock_);
   queue_.Terminate();
   if (initialized_) {
     for (auto i = thread_pool_.begin(); i != thread_pool_.end(); ++i) {
       delete *i;
     }
   }
   for (auto i = main_thread_queue_.begin(); i != main_thread_queue_.end();
        ++i) {
     while (!i->second.empty()) {
       delete i->second.front();
       i->second.pop();
     }
   }
   for (auto i = main_thread_delayed_queue_.begin();
        i != main_thread_delayed_queue_.end(); ++i) {
     while (!i->second.empty()) {
       delete i->second.top().second;
       i->second.pop();
     }
   }
-
-  if (tracing_controller_) {
-    tracing_controller_->StopTracing();
-    delete tracing_controller_;
-  }
 }
 
 
 void DefaultPlatform::SetThreadPoolSize(int thread_pool_size) {
   base::LockGuard<base::Mutex> guard(&lock_);
   DCHECK(thread_pool_size >= 0);
   if (thread_pool_size < 1) {
     thread_pool_size = base::SysInfo::NumberOfProcessors() - 1;
   }
   thread_pool_size_ =
@@ skipping 96 matching lines @@
   return base::TimeTicks::HighResolutionNow().ToInternalValue() /
          static_cast<double>(base::Time::kMicrosecondsPerSecond);
 }
 
 
 uint64_t DefaultPlatform::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, unsigned int flags) {
-  if (tracing_controller_) {
-    return tracing_controller_->AddTraceEvent(
-        phase, category_enabled_flag, name, scope, id, bind_id, num_args,
-        arg_names, arg_types, arg_values, flags);
-  }
-
   return 0;
 }
 
+
 void DefaultPlatform::UpdateTraceEventDuration(
-    const uint8_t* category_enabled_flag, const char* name, uint64_t handle) {
-  if (tracing_controller_) {
-    tracing_controller_->UpdateTraceEventDuration(category_enabled_flag, name,
-                                                  handle);
-  }
-}
+    const uint8_t* category_enabled_flag, const char* name, uint64_t handle) {}
+
 
 const uint8_t* DefaultPlatform::GetCategoryGroupEnabled(const char* name) {
-  if (tracing_controller_) {
-    return tracing_controller_->GetCategoryGroupEnabled(name);
-  }
   static uint8_t no = 0;
   return &no;
 }
 
 
 const char* DefaultPlatform::GetCategoryGroupName(
     const uint8_t* category_enabled_flag) {
   static const char dummy[] = "dummy";
   return dummy;
 }
 
-void DefaultPlatform::SetTracingController(
-    tracing::TracingController* tracing_controller) {
-  tracing_controller_ = tracing_controller;
-}
 
 size_t DefaultPlatform::NumberOfAvailableBackgroundThreads() {
   return static_cast<size_t>(thread_pool_size_);
 }
 
 }  // namespace platform
 }  // namespace v8